Question

Find the value of x2+y2 when x= a cos theta and y= a sin theta

Answer 1

Answer:

(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

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