Question

If x=a sin theta and y=a cos theta then find the value of x2+y2 ?

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Answer 1

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Given x=a sinθ and y=a cosθ

x ^2  +y^2

 =(asinθ) ^2 +(acosθ)^ 2

 =a ^2 (sin^2 θ+cos^2 θ)

=a^2

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