SOLUTION: If cos B = -8/17 in quadrant II, find sin 7B.

SOLUTION: If cos B = -8/17 in quadrant II, find sin 7B.

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Question 610017: If cos B = -8/17 in quadrant II, find sin 7B.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
If cos B = -8/17 in quadrant II, find sin 7B
**
arccosB(-8/17)≈118.07�
7B≈7*118.07=826.51�
sin7B=sin(826.51�)
reference angle≈826.51-720≈106.51 (quadrant II were sin>0)
sin 7B≈.96
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