Operatorname{cosec} θ=frac{2}{√{3}}, તો θ=ldots ldots ldots ldots

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8. Introduction to Trigonometry

easy

$\operatorname{cosec} \theta=\frac{2}{\sqrt{3}},$ તો $\theta=\ldots \ldots \ldots \ldots$

A

$30$

B

$45$

C

$60$

D

$90$

Solution

$\operatorname{cosec} \theta=\frac{2}{\sqrt{3}} \, \therefore \sin \theta=\frac{\sqrt{3}}{2} .$

But, $\sin 60=\frac{\sqrt{3}}{2} \, \therefore \theta=60$

Standard 10

Mathematics

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