8. Introduction to Trigonometry
easy

निम्नलिखित के मान निकालिए :

$\sin 60^{\circ} \cos 30^{\circ}+\sin 30^{\circ} \cos 60^{\circ}$

A

$1$

B

$2$

C

$0$

D

$4$

Solution

$\sin 60^{\circ} \cos 30^{\circ}+\sin 30^{\circ} \cos 60^{\circ}$

$=\left(\frac{\sqrt{3}}{2}\right)\left(\frac{\sqrt{3}}{2}\right)+\left(\frac{1}{2}\right)\left(\frac{1}{2}\right)$

$=\frac{3}{4}+\frac{1}{4}=\frac{4}{4}=1$

Standard 10
Mathematics

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