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1
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
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-1
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The number of values of x in the interval $$\left( {{\pi \over 4},{{7\pi } \over 4}} \right)$$ for which

$$14\cos e{c^2}x - 2{\sin ^2}x = 21 - 4{\cos ^2}x$$ holds, is ____________.

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2
JEE Main 2021 (Online) 27th August Evening Shift
Numerical
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-1
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Let S be the sum of all solutions (in radians) of the equation $${\sin ^4}\theta + {\cos ^4}\theta - \sin \theta \cos \theta = 0$$ in [0, 4$$\pi$$]. Then $${{8S} \over \pi }$$ is equal to ____________.
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3
JEE Main 2021 (Online) 18th March Morning Shift
Numerical
+4
-1
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The number of solutions of the equation

$$|\cot x| = \cot x + {1 \over {\sin x}}$$ in the interval [ 0, 2$$\pi$$ ] is
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4
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
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If $$\sqrt 3 ({\cos ^2}x) = (\sqrt 3 - 1)\cos x + 1$$, the number of solutions of the given equation when $$x \in \left[ {0,{\pi \over 2}} \right]$$ is __________.
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