JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

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Analyzing +4 | -1

The set of all values of

\lambda

for which the equation

\cos ^2 2 x-2 \sin ^4 x-2 \cos ^2 x=\lambda

has a real solution

x

, is

View answer and explanation

Correct option: B

\left[-\frac{3}{2},-1\right]

Option B (

\left[-\frac{3}{2},-1\right]

) is correct because it represents the range of the given trigonometric expression after simplification and using the range of

\cos^2 2x

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