The tangent to the curve x^2=y at (1, 1) makes an angle with the positive direction of x-axis. Which one of the following is correct?

NDA 2021 Mathematics question

The tangent to the curve at makes an angle with the positive direction of -axis. Which one of the following is correct?

Answer: (D)

, so the slope at is . Compare with standard values: , , and

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Question ID VK-033711