Question

please answer this questions

Answer 1

X= a sin theta

Y= a cos theta

X^2 + Y^2

=(a sin theta) ^2+( a cos theta) ^2

=a^2 sin^2 theta + a^2 cos ^2 theta

=a^2(sin^2 theta + cos ^2 theta)

=a^2.1

=a^2

Hope it is helpful