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If $\sin \theta + \sin^2 \theta = 1$, then the value of $\cos^2\theta + \cos^4\theta$ is :
- (a)$1$
- (b)$\frac{1}{2}$
- (c)$2$
- (d)$3$
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(A) $1$
If θ + 2 θ = 1 , then the value of 2θ + 4θ is :
CBSE Class 10 Maths PYQ · Trigonometry · Find Value using Identities · 1 Mark · July 2025 · Standard
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