Solve for x:
To find: value of x
Formula Used: 
Given: 
LHS 
Therefore, 
Taking tangent on both sides, we get
⇒ 12 = 2x2 – 6
⇒ 2x2 = 18
⇒ x2 = 9
⇒ x = 3 or x = -3
Therefore, x = ±3 are the required values of x.
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