Question: Suppose that sin = 4/5 and that is a Quadrant II angle. (a) Find the exact value of cos . Show work. I believe this

Suppose that sin = 4/5 and that is a Quadrant II angle.

(a) Find the exact value of cos . Show work. I believe this ones cos(theta)=-3/5 Im not sure how to go about the second portion, b

(b) Find the exact value of sin 2. Show work.

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