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Q. The number of tangents with positive slope that can be drawn from the origin to the curve $y=sin x$ is

NTA AbhyasNTA Abhyas 2020Application of Derivatives

Solution:

Solution
Slope of $OP=cos\alpha =\frac{sin \alpha }{\alpha }$
$\Rightarrow tan \alpha =\alpha $
(which is true for infinitely many positive values of $‘\alpha ’$ )