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If cos^(-1)(x/a) + cos^(-1) (y/b) = a ...

If `cos^(-1)(x/a) + cos^(-1) (y/b) = a`
show that : `(x^2)/(a^2) - (2xy)/(ab) cos alpha + (y^2)/(b^2) = sin^(2) alpha`.

A

`"sin"^(2)alpha`

B

`cos^(2)alpha`

C

`tan^(2)alpha`

D

`cot^(2)alpha`

Text Solution

Verified by Experts

The correct Answer is:
A
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