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Trigonometry Transformations

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The value of sin x + sin y = a and cos x + cos y = b then cos(x – y) =

A. (a² + b² + 2)/2

B. (a² - b² + 2)/2

C. (a² + b² - 2)/2

D. (b² -a² + 2)/2

E. None of the above

View Answer

Correct choice: C

Explanation:

None

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Eamcet Mathematics Trigonometry Transformations

Eamcet Mathematics
Trigonometry Transformations