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How do you find the derivative of #f(t) = cos((pit)/4)#?

Answer 1

Here you can use the Chain Rule to derive #cos# first and then its argument to get: #f'(t)=-sin(pit/4)*pi/4=-pi/4sin(pit/4)#

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Answer 2

Elijah Abram

To find the derivative of ( f(t) = \cos\left(\frac{\pi t}{4}\right) ), you can use the chain rule. The derivative is given by:

[ f'(t) = -\frac{\pi}{4} \sin\left(\frac{\pi t}{4}\right) ]

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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