Homework Help: trig

Posted by Bernice on Thursday, December 17, 2009 at 12:00pm.

2. Determine the amplitude of:
y= cos x

3. Determine the domain of:
y= 4 sin x

4. Determine the range of:
y= - sin x

5. Determine the period of:
y= 3 sin đx

6. Determine the phase shift of:
y= 3 cos (2x -1)

7. Solve the following equation for indicated value of x:
y= 4 sin x; for x = đ

8. Solve the following equation for the indicated value of x
y= - cos x ; for x= 4đ

trig - MathMate, Thursday, December 17, 2009 at 6:29pm
Most of these questions can be answered by the definition of the general trigonometric functions:
y = a sin A(x-φ)
a is the amplitude
2π/A = period
φ = phase shift.

If you can transform the trigonometric functions into the above form and evaluate the values of a, A, and φ, the answers would become apparent.

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