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If , then at will be:
If $x = a\cos\theta, y = a\sin\theta$, then $\frac{dy}{dx}$ at $\theta = \frac{\pi}{4}$ will be:
- (a)-1
- (b)Not defined
- (c)a
- (d)0
Answer
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From ISC 2025 Improvement Mathematics Paper 1, question 1(ii).