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10 November, 13:41

Take a triangle with internal angles α, β, and 90o. Let us call the hypotenuse ℎ. Which expression gives the length of side b, which is opposite to angle β?

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  1. 10 November, 17:06
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    b = h cos α.

    Step-by-step explanation:

    sin β = b / h

    b = h sin β.

    or cos α = b / h

    so b = h cos α.
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