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8. Introduction to Trigonometry
easy
કિંમત શોધો :
$\sin 60^{\circ} \cos 30^{\circ}+\sin 30^{\circ} \cos 60^{\circ}$
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
