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Prove that 1 + sin^2A + cos^A = 2

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  1. Today, 09:53
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    Step-by-step explanation:

    1+sin² (a) + cos² (a) = 2

    note : for all a in R : sin² (a) + cos² (a) = 1

    so : 1+sin² (a) + cos² (a) = 1+1 = 2
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