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Please help me with these problems . + 3.57 b. Find the exact value of sin(x + y) if sin x= = in Quadrant II

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Please help me with these problems .

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+ 3.57 b. Find the exact value of sin(x + y) if sin x= = in Quadrant II and tan y= = in 12 Quadrant Ill. Sin x : tany = 12 5 3 sin( NI - Z 6. Use a double-angle or half-angle formula to simplify the given expression. a. Find cos * if tan x = - 4 and #

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