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Trigonometry Transformations

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If A + B + C = 2S then cos² S + cos²(S – A) + cos²(S – B) + cos²(S – C) =

A. 2sinAcosBsinC

B. 4cosA/2cosB/2cosC/2

C. 2 + 2cosAcosBcosC

D. sinAsinB

E. None of the above

View Answer

Correct choice: C

Explanation:

None

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Eamcet Mathematics Trigonometry Transformations

Eamcet Mathematics
Trigonometry Transformations