Question

If x=a sinθ+b cosθ and y=a cosθ+b sinθ then prove that x^2+y^2=a^2+b^2 please answer fast and correct the first on will be marked brainiest

Answer 1

Answer:

but if ur question is x=a sinθ-b cosθ and y=a cosθ+b sinθ then u can get the correct proof