Very-short and Short-Answer Questions. Write the value of (1+ ^2 … - Vidyadip

Question

Very-short and Short-Answer Questions.
Write the value of $\big(1+\tan^2\theta\big)\cos^2\theta.$

✓

Answer

$\big(1-\tan^2\theta\big)\cos^2\theta$$=\sec^2\theta\times\frac{1}{\sec^2\theta}$
$=1$

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