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6 September, 11:31

Given that sinθ=8/17, what is cosθ? Enter your answer, as a simplified fraction, in the boxes.

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  1. 6 September, 13:30
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    Cosθ = 15/17

    Step-by-step explanation:

    Sinθ = 8/17

    We know that,

    Sin^2 θ + cos^2 θ = 1

    64/289 + cos^2 θ = 1

    1 - 64/289 = cos^2 θ

    225/289 = cos^2 θ

    Cos θ = √225/289

    Cos θ = 15/17
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