ind the exact value of tan 2 cos y² = 25 y = 5 12 [2 COB-¹ (-17/13)] - y Since x=-12 and y = 5, tan 0 = X tan (20). tan (20) = 2 tan 0 1- tan ²0 2 (-=-512 1-(-=-172) 120 119 5 -12 100 Substitute tan 8 = 5

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