SOLUTION: Please help me solve w/work ASAP: If sin(A)=17/45 with pi/2 < A < pi and tan(B)=-105/88 with 3pi/2 < B < 2pi, then what is the exact value of sin(A+B)?
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-> SOLUTION: Please help me solve w/work ASAP: If sin(A)=17/45 with pi/2 < A < pi and tan(B)=-105/88 with 3pi/2 < B < 2pi, then what is the exact value of sin(A+B)?
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Question 974495: Please help me solve w/work ASAP: If sin(A)=17/45 with pi/2 < A < pi and tan(B)=-105/88 with 3pi/2 < B < 2pi, then what is the exact value of sin(A+B)? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Please help me solve w/work ASAP: If sin(A)=17/45 with pi/2 < A < pi and tan(B)=-105/88 with 3pi/2 < B < 2pi, then what is the exact value of sin(A+B)?
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sin(A)=17/45 with pi/2 < A < pi --> Q2
Find the cos(A): (Cosine negative in Q2)
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tan(B)=-105/88 with 3pi/2 < B < 2pi --> Q4
Find sine & cosine of B
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tan(B) = y/x
sin(B) = y/r = -105/137
cos(B) = x/r = 88/137
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sin(A + B) = sin(A)cos(B) + sin(B)cos(A)
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