Math, asked by samaroy312000, 1 year ago

if cos(∅-a)=p, sin(∅+b)=q, show that p^2 + q^2 -2pq sin(a+b) = cos^2(a+b)

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Answered by catchmeifucan
6
sorry for the image quality.
if you want a better image then tell me
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enrique: great answer though
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