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8. Introduction to Trigonometry
easy
$\frac{1}{\tan ^{2} \theta}+1=\ldots$
A
$\cot ^{2} \theta$
B
$\sec ^{2} \theta$
C
$\operatorname{cosec}^{2} \theta$
D
$\cos ^{2} \theta$
Solution
$\frac{1}{\tan ^{2} \theta}+1=\cot ^{2} \theta+1=\operatorname{cosec}^{2} \theta$
Standard 10
Mathematics