Question

If x= a sinø and y = a cosø, then x²+y² ​

Answer 1

Answer:

a²

Step-by-step explanation:

x²+y² ​  =  ( a sinø )² +  ( a cosø )²

          =  a² x ( sinø² + cosø²)

          = a² x 1 = a²

As we know ( sinø² + cosø² = 1 )

Answer 2

Answer:

a^2

Step-by-step explanation:

x^2+y^2=(asin⊙)^2+(a cos⊙)^2

=a^2 sin^2⊙+a^2cos^2⊙

=a^2