1

JEE Main 2019 (Online) 12th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

The number of solutions of the equation

1 + sin

1 + sin

^{4}x = cos^{2}3x, $$x \in \left[ { - {{5\pi } \over 2},{{5\pi } \over 2}} \right]$$ is :2

JEE Main 2019 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

Let S = {$$\theta $$ $$ \in $$ [–2$$\pi $$, 2$$\pi $$] : 2cos

^{2}$$\theta $$ + 3sin$$\theta $$ = 0}. Then the sum of the elements of S is3

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The sum of all values of $$\theta $$ $$ \in $$$$\left( {0,{\pi \over 2}} \right)$$ satisfying

sin

sin

^{2}2$$\theta $$ + cos^{4}2$$\theta $$ = $${3 \over 4}$$ is -4

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

If 0 $$ \le $$ x < $${\pi \over 2}$$, then the number of values of x for which sin x $$-$$ sin 2x + sin 3x = 0, is :

Questions Asked from Trigonometric Equations (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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