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5 Give sin(A)=-15/17 with A in Quadrant III and cos(B)=-4/5 with B in Quadrant II, find sin(A+B) 6. Given cos(A)= 9/10 and A is in
5 Give sin(A)=-15/17 with A in Quadrant III and cos(B)=-4/5 with B in Quadrant II, find sin(A+B)
6. Given cos(A)= 9/10 and A is in Quadrant IV, find cos(2A)
7. Given cos(A)= -12/13 , and A is in Quadrant III, find sin(2A)
8. If cos(x)= -3/5 and x is in Quadrant II, find cos(x/2)
9. If cos(A)= 7/25 , A is in quadrant I, find sin(x/2)
10. Solve 2 cos2(x)=9sin(x)- 4 where x satisfice 0 x <2
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