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Trigonometry Transformations

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If cos α + cos β = a, sin α + sin β = b and α-β = 2θ, then cos 3θ/cos θ

A. a² + b² – 2

B. a² + b² – 3

C. 3 – a² – b²2

D. (a² + b²)/4

E. None of the above

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Correct choice: B

Explanation:

None

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Eamcet Mathematics Trigonometry Transformations

Eamcet Mathematics
Trigonometry Transformations