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Proof of cos(x+y) and sin(x+y) in Hindi
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By graphical method.....
Prove that 🔥 cos (x + y) = cosx cosy - sinx siny 🔥 Full derivation by #mathemafia
Trigonometry Proof: cos (x + y) = cos x cos y – sin x sin y (https://youtu.be/b0o_dvFkYbU)
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