- #1

- 69

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## Homework Statement

If f(x)= tan(2x), then f'(pi/6) =

## Homework Equations

deriv. of tan(pi/3)

## The Attempt at a Solution

How can I solve this? I am not supposed to use a calculator?? tan(pi/3) ...am I supposed to memorize this?

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- Thread starter SAT2400
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- #1

- 69

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If f(x)= tan(2x), then f'(pi/6) =

deriv. of tan(pi/3)

How can I solve this? I am not supposed to use a calculator?? tan(pi/3) ...am I supposed to memorize this?

- #2

- 259

- 3

What is f'(x) ?

Hint: use the chain rule.

Hint: use the chain rule.

- #3

- 69

- 0

tan(pi/3) ' = sec^2(pi/3) is it??

- #4

- 35

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And now how can you simplify that using the definition of sec?

- #5

Mark44

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The derivative of tan(pi/3) is zero. tan(pi/3) is a constant, and the derivative of any constant is zero.## Homework Statement

If f(x)= tan(2x), then f'(pi/6) =

## Homework Equations

deriv. of tan(pi/3)

Yes. There are a few angles whose trig functions you should have memorized - 0, pi/6, pi/4, pi/3, pi/2, as well as their supplements and combinations with pi/2, pi, and so on. You should also have memorized all of the six trig functions in terms of the sine or cosine.## The Attempt at a Solution

How can I solve this? I am not supposed to use a calculator?? tan(pi/3) ...am I supposed to memorize this?

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