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I+11 56 21. (10 points) Solve: + =0 x2-49 22. (10 points) Suppose that sin 0 = 1/4 and that 0 is a Quadrant II

I+11 56 21. (10 points) Solve: + =0 x2-49 22. (10 points) Suppose that sin 0 = 1/4 and that 0 is a Quadrant II angle. (a) Find the exact value of cos 0. (b) Find the exact value of sin(20)

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