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If x = sin alpha, y = sin beta, z = sin ...

If `x = sin alpha, y = sin beta, z = sin (alpha+beta)` then `cos(alpha+beta)=`

A

`(z^(2)-x^(2)-y^(2))/(xy)`

B

`(z^(2)-x^(2)-y^(2))/(2xy)`

C

`(z^(2)+x^(2)+y^(2))/(xy)`

D

`(x^(2)+y^(2)+z^(2))/(2xy)`

Text Solution

Verified by Experts

The correct Answer is:
B
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