Question

Answer this fast plzzz..!!?
Prove that..
${x}^{2} + {y}^{2} = {a}^{2} + {b}^{2}$
if,
$x = a \sin( \alpha ) + b \cos( \alpha ) \\ y = a \cos( \alpha ) - b \sin( \alpha )$
where, α=theta

Answer 1

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Answer 2

hi

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