Mathematics

Mathematics, 16.08.2020 20:01, mpjoserivera

(a) If tan A=x/y
prove that: y. cos2A +x. sin2A= y.
Please help me..

(a) If tan A=x/yprove that: y.cos2A +x.sin2A= y.Please help me..

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(a) If tan A=x/y
prove that: y. cos2A +x. sin2A= y.
Please help me..
...

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