If sin A + sin 2A =x and cos A + cos 2A ...

If `sin A + sin 2A =x` and `cos A + cos 2A = y`, then `( x^(2) + y^(2) ) ( x^(2) + y ^(2) -3)=`

A

2y

B

y

C

3y

D

None of these

Verified by Experts

The correct Answer is:

A

Similar Questions

Explore conceptually related problems

If sin A + sin 2A = x and cos A + cos 2A = y, then (x^(2)+y^(2)) (x^(2)+y^(2)-1)=

If sinA+sin2A=xandcosA+cos2A=y , then (x^(2)+y^(2))(x^(2)+y^(2)-3)=?

If sin x + sin y = a and cos x + cos y = b then tan ((x + y) / (2)) is

If x = 4 cos A + 5 sin A and y = 4 sin A - 5 cos A, then the value of x^(2) + y^(2) is:

If x =4 cos A + 5 sin A and y = 4 sin A - 5cos A , then the value of (x^(2) + y^2) is :

If sin x+sin y=a and cos x+cos y=b, then tan((x+y)/2 ' is equal to

If x = a cos ^ (2) theta sin theta and y = a sin ^ (2) theta cos theta then ((x ^ (2) + y ^ (2)) ^ (3)) / (x ^ (2 ) and ^ (2)) =

If y= sin x+cos x then (d^(2)y)/(dx^(2)) is :-

If sin^(-1) x + sin^(-1) y = (pi)/(2) and sin 2x = cos 2y , then