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OpenStudy (anonymous):
If α and B are the measures of two first quadrants angles and sinα=4/5 and sin B= 5/13 find sin (α+B)
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sam (.sam.):
Find sinα=4/5 and sin B= 5/13
sam (.sam.):
sinα=4/5 α=53.13, 126.87 ---------------------- sin B= 5/13 B=22.62, 157.38 then sin (α+B) sin (53.13+22.62)................(1) sin(126.87+157.38)..............(2)
sam (.sam.):
just ask if u didn't get it :)
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