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OpenStudy (anonymous):
What is sin a + sin b? What is sin a - sin b? Sin A = 65/87 Sin B = 20/ 29
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OpenStudy (freckles):
does a=A and b=B?
OpenStudy (freckles):
Is so, all they are saking you to do is: (65/87)+(20/29) and (65/87)-(20/29)
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