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14 June, 13:32

Prove that sin^2 pi/6 + cos^2 pi/3 - tan^2 pi/4 = - 1/2

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  1. 14 June, 16:05
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    See below.

    Step-by-step explanation:

    sin pi/6 = 1/2

    cos pi/3 = 1/2

    tan pi/4 = 1

    So sin^2 pi/6 + cos^2 pi/3 - tan^2 pi/4

    = 1/4 + 1/4 - 1

    = - 1/2.
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