https://www.khanacademy.org/math/revision-term-1-ncert-math-class-10/x2f82315bf1a14434:week-2/x2f82315bf1a14434:introduction-to-trigonometry/v/trigonometric-ratios-in-right-triangles-indian-accent 2025-06-09T10:42:13.693429425Z Trigonometric ratios in right triangles This video shows a few examples where he starts with the two legs of a right triangle and he finds the trig ratios of one of the acute angles. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Trigonometric ratios in right triangles This video shows a few examples where he starts with the two legs of a right triangle and he finds the trig ratios of one of the acute angles. https://cdn.kastatic.org/ka-youtube-converted/goQkPbfy0uo.mp4/goQkPbfy0uo.mp4 732 Trigonometry https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-trig-ratios-intro/e/trigonometry_1 2026-04-01T11:24:50.133517701Z Trigonometric ratios in right triangles Given the side lengths of a right triangle, find the sine, cosine, or tangent of one of the acute angles. Tomer Gal exercise https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-solve-for-a-side/v/example-trig-to-solve-the-sides-and-angles-of-a-right-triangle 2021-06-30T17:32:38Z Solving for a side in right triangles with trigonometry Sal is given a right triangle with an acute angle of 65° and a leg of 5 units, and he uses trigonometry to find the two missing sides. Sal Khan video https://cdn.kastatic.org/googleusercontent/X0ECxxkRbmZu7H78vm4EbH8BRKYqPBGlzkuAdFqDsmG5d33yLEW3qY54S02C0-YF6OUMI-SPnXfHJYAyuzICHfCYJQ Solving for a side in right triangles with trigonometry Sal is given a right triangle with an acute angle of 65° and a leg of 5 units, and he uses trigonometry to find the two missing sides. https://cdn.kastatic.org/ka-youtube-converted/l5VbdqRjTXc.mp4/l5VbdqRjTXc.mp4 424 Trigonometry https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-solve-for-a-side/e/trigonometry_2 2025-03-09T12:38:48.303569754Z Solve for a side in right triangles Given one side length and an acute angle in a right triangle, find another side using trigonometry. Tomer Gal exercise https://www.khanacademy.org/math/10-mr-foundation/x09747e87495927f2:geometry/x09747e87495927f2:into-to-trigonometric-ratios/e/finding-trigonometric-ratios 2026-04-08T01:15:04.085520103Z Find trigonometric ratios using the Pythagorean theorem How to find sec of an angle when sin is given? Or any other trigonometric ratio? Let's practice some problems that test this skill. ashish exercise https://www.khanacademy.org/math/10-mr-foundation/x09747e87495927f2:geometry/x09747e87495927f2:trigonometric-ratios-of-complementary-angles/v/worked-examples-trigonometric-ratios-of-complementary-angles 2020-08-25T18:06:02Z Finding trigonometric ratios of complementary angles (worked examples) Let's solve a few problems where we find the trigonometric ratios of complementary angles. Problems like Cosec (80) = Sec (10). Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/sxzzjeWLiksWWWhk9IGXTGqRI5le7ldviHYEbL-9vDXl0wvTmToSFFhUkpkR3ObVzKzAW4Pxhea0bmArfDJKS_vL7Q Finding trigonometric ratios of complementary angles (worked examples) Let's solve a few problems where we find the trigonometric ratios of complementary angles. Problems like Cosec (80) = Sec (10). https://cdn.kastatic.org/ka-youtube-converted/SusT1qnhvQY.mp4/SusT1qnhvQY.mp4 245 Trigonometry https://www.khanacademy.org/math/10-mr-foundation/x09747e87495927f2:geometry/x09747e87495927f2:trigonometric-ratios-of-complementary-angles/e/evaluating-trigonometric-ratios-of-complementary-angles 2025-12-30T07:05:15.972746521Z Evaluating trigonometric ratios of complementary angles Let's evaluate trigonometric ratios of complementary angles. ashish exercise https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-2/x03e14a980a7a91ad:trigonometry/v/30-60-90-triangle-example-problem-indian-accent 2025-06-04T10:04:13.13703146Z 30-60-90 triangle example problem Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 30-60-90 triangle example problem Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem https://cdn.kastatic.org/ka-youtube-converted/dWsdnYvZlyw.mp4/dWsdnYvZlyw.mp4 401 Trigonometry https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-special-right-triangles/e/pythagorean_theorem_2 2025-12-30T07:05:15.972746521Z Special right triangles Use the Pythagorean theorem to discover patterns in 30°-60°-90° and 45°-45°-90° triangles. Ben Alpert exercise https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-special-right-triangles/v/30-60-90-triangle-side-ratios-proof 2021-02-16T16:08:14Z Special right triangles proof (part 1) Learn how to prove the ratios between the sides of a 30-60-90 triangle. Sal Khan video https://cdn.kastatic.org/googleusercontent/6aIMRLIsEffQv2yhgkdHfU9w-R7CxJt7PcuzlcdjECYRUZXtnFGC3eMhH4OO2bQaA23hRtPYNSBJMuvgF92exlw Special right triangles proof (part 1) Learn how to prove the ratios between the sides of a 30-60-90 triangle. https://cdn.kastatic.org/ka-youtube-converted/SFL4stapeUs.mp4/SFL4stapeUs.mp4 419 Trigonometry https://www.khanacademy.org/math/mr-class-10/x5cfe2ca097f0f62c:trigonometry/x5cfe2ca097f0f62c:trigonometric-ratios-of-some-specific-angles/v/special-right-triangles-proof-part-2-indian-accent 2025-06-04T10:04:13.13703146Z Special right triangles proof (part 2) Showing the ratios of the sides of a 45-45-90 triangle are 1:1:sqrt(2) Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Special right triangles proof (part 2) Showing the ratios of the sides of a 45-45-90 triangle are 1:1:sqrt(2) https://cdn.kastatic.org/ka-youtube-converted/bNJm8LctgoE.mp4/bNJm8LctgoE.mp4 344 Trigonometry https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-2/x03e14a980a7a91ad:trigonometry/e/evaluating-expressions-of-trigonometric-ratios-for-some-special-angles 2026-03-07T07:20:41.87360937Z Evaluating expressions of trigonometric ratios for some special angles Let's evaluate expressions of trigonometric ratios for some special angles. ashish exercise https://www.khanacademy.org/math/revision-mr-class-9-term-2/x6e82706cbb5834ba:week-3/x6e82706cbb5834ba:trigonometry/e/revision-trigonometry-mh-class-9 2026-02-03T09:22:16.808346173Z Revision trigonometry MH class 9 . Khan Academy exercise