Question

Xsin^3a+ycos^3a=sina*cosa and xsina-ycosa=0 then x^2+y^2=?

Answer 1

Given xSinA – yCosA = 0
⇒ x.SinA = y CosA     ........(1)

Consider 

 

     {From eq 1}





xSinA = SinACosA

x = CosA          ......(2)

Substitute this value in the eq (1)
 
We get y = SinA