Finding exact solutions to a trigonomic equation?

7cos x+ 12=6cos x+13
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1 Answer

7 cosx + 12 = 6cosx + 13

7cosx - 6cosx = 13 - 12

cosx = 1 ⇒ x = 0, becouse cos ( 0 ) = 1
by Level 8 User (36.8k points)

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