Find The Derivative Of Sec(X) Using Quotient Rule And Trig Identities | Math Tips And Tricks

Derivative of sec x

sec x tan x

The derivative of sec(x) can be found using the quotient rule and trigonometric identities.

Recall that:

sec(x) = 1/cos(x)

Using the quotient rule, we get:

d/dx(sec(x)) = [cos(x)(-1/cos^2(x))] / [cos(x)^2]

Simplifying, we get:

d/dx(sec(x)) = -sin(x)/cos^2(x)

Using the identity 1 + tan^2(x) = sec^2(x), we can rewrite cos^2(x) as 1 + tan^2(x).

So the final result is:

d/dx(sec(x)) = -sec(x)tan(x)

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