# pre calc

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1. For the following functions listed below:
(a) f(x) = -2cosx f(x) = 0.25sinx
(b) f(x) = -3sin(2x+3)+7 f(x) = sinx + 4
Find :
(i) the amplitude
(ii) the period

• pre calc -

I don't see why they are asking for the numbers for two different functions for each "part"

The amplitude is the coefficient (constant) in front of the sin or cos term.

The period is 2 pi divided by the coefficient of x.

For f(x) = 0.25 sinx ,
the amplitude is 0.25 and the period is 2 pi.

You do the others

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