JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

1 Easy

1 of 1

Application +4 | -1

The general value of

\theta

,obtained from the equation

\cos 2 \theta=\sin \alpha

, is

View answer and explanation

Correct option: A

\theta=n \pi \pm\left(\frac{\pi}{4}-\frac{\alpha}{2}\right)

Option A (

\theta=n \pi \pm\left(\frac{{\pi}}{{4}}-\frac{{\alpha}}{{2}}\right)

) is correct because it is derived by converting sine to cosine and applying the general solution formula.

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\mathrm{X}

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