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Class 11 math (India)

Course: Class 11 math (India) > Unit 3

Lesson 6: Trigonometric equations

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Principal solutions of trigonometric equation

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Find the principal solutions of the equation cosine, theta, equals, start fraction, 1, divided by, square root of, 2, end square root, end fraction.

(Choice A)
theta, equals, start fraction, pi, divided by, 4, end fraction
(Choice B)
theta, equals, start fraction, 3, pi, divided by, 4, end fraction
(Choice C)
theta, equals, start fraction, 5, pi, divided by, 4, end fraction
(Choice D)
theta, equals, start fraction, 7, pi, divided by, 4, end fraction
(Choice E)
theta, equals, start fraction, 9, pi, divided by, 4, end fraction

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