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OpenStudy (anonymous):
5sinβ=4 and β is an acute angle, what is cosβ
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OpenStudy (tkhunny):
1) Please draw a Right Triangle. 2) Designate an acute angle as \(\beta\). 3) Label two sides so that \(\sin(\beta) = 4/5\) 4) Use the Pythagorean Theorem to calculate the length of the third side. You're nearly done!
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