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Solve:(with the solution) Tan π/16 +2Tan π/8 +4 =?

Solve:(with the solution)
Tan π/16 +2Tan π/8 +4 =?
 

Grade:11

1 Answers

Vijay Mukati
askIITians Faculty 2590 Points
7 years ago
Hint: Replace tan Pi/8 by tan 2 Pi/16, Use the formula for tan2A = 2tanA/ (1-tan2A). Put tanA = x and solve for x. Replace back with the original value of x. Thanks.

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