SOLUTION: How do you find sin(a+B), tan(a-B), cos(2B), and sin(a/2) if a and B are both in the first quadrant and sin(a)=2/3, and cos(B)=3/4?

Question 1023517: How do you find sin(a+B), tan(a-B), cos(2B), and sin(a/2) if a and B are both in the first quadrant and sin(a)=2/3, and cos(B)=3/4?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How do you find sin(a+B), tan(a-B), cos(2B), and sin(a/2) if a and B are both in the first quadrant and sin(a)=2/3, and cos(B)=3/4?
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Look at "Half angle formulas" in Wikipedia.

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