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Prove that (1+cos(A-B)cosC)/(1+cos(A-C)c...

Prove that `(1+cos(A-B)cosC)/(1+cos(A-C)cosB)=(a^(2)+b^(2))/(a^(2)+c^(2))`

A

`(a-b)/(a-c)`

B

`(a+b)/(a+c)`

C

`(a^(2)-b^(2))/(a^(2)-c^(2))`

D

`(a^(2)+b^(2))/(a^(2)+c^(2))`

Text Solution

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The correct Answer is:
D
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Critical Thinking
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