In ∆ABC, ∠A is a right angle and m∠B = 45°. Find BC.

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In ∆ABC, ∠A is a right angle and m∠B = 45°. Find BC.

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Delilah 1 week 2021-09-11T02:40:41+00:00 1 Answer 0

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    2021-09-11T02:41:42+00:00

    Step-by-step explanation:

    In ∆ABC, if <A is 90° and <B is 45° then hypotenuse is BC.

    Now,

    Cos B= base/height

    Cos B= AB/ BC

    BC= AB/cos 45°.

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