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Course: Class 11 > Unit 3
Lesson 5: Trigonometric identities: Sum and difference- Trig angle addition identities
- Using the cosine angle addition identity
- Using the cosine double-angle identity
- Trigonometric functions of sum and difference of angles
- Proof of the sine angle addition identity
- Proof of the cosine angle addition identity
- Trig challenge problem: cosine of angle-sum
- Sum and difference of trigonometric functions
- Evaluate trigonometric expressions (intermediate)
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