Please Help Angle α lies in quadrant II , and tanα= −12/5 . Angle β lies in quadrant IV , and cosβ=3/5 .

What is the exact value of sin(α+β) ?

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sin(α+β) =

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

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the answer is d

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yes it represnts a functio, their are not 2 of the same numbers on the both sides