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3.5 DERIVATIVES OF TRIG FUNCTIONS

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3.5 DERIVATIVES OF TRIG FUNCTIONS

- Graph y1 = sin xand y2 = nderiv (sin x)
- What do you notice?

(use trig identity for sin(x + h))

0

1

- Graph y1 = cos xand y2 = nderiv (cos x)
- What do you notice?

(use trig identity for cos(x + h))

0

1

(quotient rule)

(trig id cos2x + sin2x = 1)

(quotient rule)

(quotient rule)

(quotient rule)

- Find an equation of the tangent line to the function
f(x) = sec x at the point

(slope)

- Find the second derivative of y = csc x.

(Product rule)