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Question

Find the principal solution of the following equation:
tanx=3

A
x=π3 and x=43π
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B
x=π2 and x=13π
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C
x=π4 and x=23π
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D
x=3 and x=43π
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Solution

The correct option is A x=π3 and x=43π
We have,
tanx=3
tanx=tan(π3)
x=π/3eqn(1)
Put again equation
tanx=tan(π+π3)
x=4π3eqn(2)
From equation (1) and (2)
x=π3,4π3
Hence this is the answer.

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