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    maicropolis Posts: 1, Reputation: 1
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    #1

    Jan 16, 2013, 06:56 AM
    Proving trigonometric identities
    sin^(3) t + cos^(3) t + sin t cos^(2) t +sin^(2) t cos t = sin t + cos t
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    ebaines Posts: 12,131, Reputation: 1307
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    Jan 16, 2013, 09:22 AM
    Hint: replace the sin^2(t) term with 1-cos^2(t), and the cos^2t term with 1-sin^2t, and see how things cancel out.
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