JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

\cos \alpha+\cos \beta=a, \sin \alpha+\sin \beta=

b

and

\theta

is the arithmetic mean between

\alpha

and

\beta

then

\sin 2 \theta+\cos 2 \theta

is equal to

View answer and explanation

Correct option: D

none of these

The correct answer is 1 because the given expression simplifies to 1 using trigonometric identities and the condition x + y = z.

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