If cos-1(x/a) + cos-1(y/b) = alpha, Prove that, x2/a2 + y2/b2 - 2xy/ab * [cos(alpha)]= sin2(alpha) - Maths - Inverse Trigonometric Functions

Question

If cos-1(x/a) + cos-1(y/b) = alpha,
Prove that, x2/a2 +
y2/b2 - 2xy/ab * [cos(alpha)]=
sin2(alpha)​​

Varun.Rawat · Accepted Answer

Refer the following link :

https://www meritnation
com/ask-answer/question/i-have-2-question-1-if-cos-1-x-a-cos-1-y-b-dprove-that/inverse-trigonometric-functions/5263451

If cos-1(x/a) + cos-1(y/b) = alpha, Prove that, x2/a2 + y2/b2 - 2xy/ab * [cos(alpha)]= sin2(alpha)​​