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+2 votes
53.5k views
in Mathematics by (130k points)

Find the principal and general solutions of the following equations: cot x = − √3

1 Answer

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Best answer

we have cot x = - √ 3

 ⇒ tan x = - 1 / √ 3

.................(1)

as we know that tan (π - θ) = - tan  θ  and  tan (2π -  θ) = - tan  θ

now from (1) we get
 tan x = tan (5π / 6)  and  tan = tan (11π / 6)

 ⇒ x = 5π / 6  and   x = 11π / 6

so the principal solutions are x = 5π / 6  and   x = 11π / 6

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