If $\sin A+\cos A=\sqrt{2}$, then the value of $\cos ^2 A$ is

JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

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1 of 1

Application +4 | -1

\sin A+\cos A=\sqrt{2}

, then the value of

\cos ^2 A

View answer and explanation

Correct option: B

1 / 2

Option B (1/2) is correct because by solving the given equation for A, we find A =

\pi/4

, and then

\cos^2 A

can be easily calculated.

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