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8. Introduction to Trigonometry
easy
$\tan ^{2} \theta=\sin ^{2} \theta+\cos ^{2} \theta$ અને $0<\theta<90,$ તો $\theta$ મેળવો.
A
$30$
B
$45$
C
$60$
D
$75$
Solution
$\tan ^{2} \theta=\sin ^{2} \theta+\cos ^{2} \theta \quad \therefore \tan ^{2} \theta=1 \quad \therefore \tan \theta=1 \quad \therefore \theta=45$
Standard 10
Mathematics
