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Question Number 158453 by zakirullah last updated on 04/Nov/21

$$prove\frac{d}{dx}{sec}^2\frac{\pi }{4}=2$$

Commented by yeti123 last updated on 04/Nov/21

$$\frac{d}{dx}\left({\sec }^2\left(\pi /4\right)\right)=\frac{d}{dx}\left(2\right)=0$$

Commented by zakirullah last updated on 04/Nov/21

$$excusemesir!imean$$$$how{f}^{{}^{\prime }}\left(\frac{\pi }{4}\right)={sec}^2\frac{\pi }{4}=2accordingtotaylorseries.$$$$$$

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