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8. Introduction to Trigonometry
easy
જો $\tan \theta=1,$ તો $\sin \theta \cdot \cos \theta=\ldots \ldots \ldots \ldots$
A
$2$
B
$1$
C
$\frac{1}{2}$
D
$\frac{1}{4}$
Solution
$\tan \theta=1$
$\therefore \theta=45$
$\therefore \sin \theta \cdot \cos \theta=\sin 45 \cdot \cos 45=\frac{1}{\sqrt{2}} \cdot \frac{1}{\sqrt{2}}=\frac{1}{2}$
Standard 10
Mathematics
