\(\left(\cfrac{4}{\sec^2 \theta}+\cfrac{1}{1+\cot^2 \theta}+3 \sin^2 \theta \right)\) এর মান ___________

\(\left(\cfrac{4}{\sec^2 \theta}+\cfrac{1}{1+\cot^2 \theta}+3 \sin^2 \theta \right)\) এর মান ____________

\(\left(\cfrac{4}{\sec^2 \theta}+\cfrac{1}{1+\cot^2 \theta}+3 \sin^2 \theta \right)\) এর মান 4

\(\left(\cfrac{4}{\sec^2 \theta}+\cfrac{1}{1+\cot^2 \theta}+3 \sin^2 \theta \right)\)
\(=\left(4\cos^2 \theta+\cfrac{1}{cosec^2 \theta}+3 \sin^2 \theta \right)\)
\(=4 cos^2⁡θ+sin^2⁡θ+3 sin^2⁡θ\)
\(=4 sin^2⁡θ+4 cos^2⁡θ\)
\(=4(sin^2⁡θ+cos^2⁡θ )\)
\(=4\)