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Trigonometry
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OpenStudy (anonymous):
tan a=4/3, pi
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OpenStudy (jdoe0001):
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OpenStudy (anonymous):
sin(a+b)= sina.cosb+cosa.sinb tana=sina/cosa h=root under 4^2+3^2=5 sina=4/5 cosa= 3/5 similarly solve cosb & get answer.
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