Why is the derivative equals to 0?

asked Apr 13, 2020 201k views

3 votes

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5 votes

Answer:

see explanation

Explanation:

Using the trigonometric identity

• tan²x + 1 = sec²x

⇒ tan²x - sec²x = - 1

Thus the derivative reduces to

(d)/(dx) ( - 1 ) = 0

Kezz answered Apr 18, 2020

by Kezz

5.3k points

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