Saturday

January 31, 2015

January 31, 2015

Posted by **kim** on Friday, February 12, 2010 at 1:14pm.

(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 -
**drwls**, Friday, February 12, 2010 at 1:45pmI 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

**Answer this Question**

**Related Questions**

math - tanx+secx=2cosx (sinx/cosx)+ (1/cosx)=2cosx (sinx+1)/cosx =2cosx ...

Pre Calculus - Having trouble verifying this identity... cscxtanx + secx= 2cosx ...

Math C30 - Equations containing circular functions and unit circle... solve ...

Mathj C30 - Solving Equations Containing Circular Functions : Solve 2cosx sinx...

pre-calc help !!!!!!! - 1)tan^2x=3 ? 2)tan x sin^2x=tan x ? 3)2cosx sinx - cos x...

Pre-Calc - Radical ((1-sinx)/(1+sinx))= (1-sinx)/cosx (absolute) Simplify

Trig - prove the identity (sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= ...

pre calc - find the domain of the following functions f(x)=1/x+ 5/x-3

Trig Help - Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx...

Check a few more CALC questions, please? - I feel pretty good on my answers. Are...