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CBSE Class 12 Math 2023 Delhi Set 3 Solved Paper

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SECTION - B
This section comprises of Very Short Answer (VSA) type questions of 2 marks each.
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Question : 7 of 12
Marks: +1, -0
(a) Find the value of kk for which the function ff given as
f(x)={1−cos⁡x2x2,if x≠0k,if x=0.f(x)=\begin{cases} \frac{1-\cos x}{2x^2}, & \text{if } x \neq 0 \\ k, & \text{if } x=0 \end{cases}.
is continuous at x=0x=0.
OR
(b) If x=acos⁡tx = a \cos t and y=bsin⁡ty = b \sin t, then find d2ydx2\frac{d^2 y}{d x^2}.
Solution:     👈: Video Solution
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