99sbabyz 99sbabyz

03-07-2020
Mathematics

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find the length of side AB Give your answer to 1 decimal place

find the length of side AB Give your answer to 1 decimal place class=

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Stephen46 Stephen46

03-07-2020

Answer:

First to find AB we use cosine

cos ∅ = Adjacent / hypotenuse

AB is the adjacent

BC is the hypotenuse

cos ∅ = AB/AC

cos 70 = AB / 8

AB = 8 cos 70°

AB = 2.736

AB = 2.7cm to one decimal place

Hope this helps

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