mathematics 90
please check attachment for full test
The Summary of Formulas and Trigonometric Tables from the Appendix is included for your use during the test.
____ 1.
a.
What is the phase shift of y = cos (x + )? to the right
b.
c.
d.
to the left
to the left
to the right
____ 2.
____ 3.
____ 4.
Between what values of x is cos x a increasing function?
- Betweenx=(2n–1) and1n ,wherenisanyinteger.
- Between x = 2n and 2n, where n is any integer.
- Betweenx=(2n and2n–1 ),wherenisanyinteger.
- Betweenx=(2n–1) and2n ,wherenisanyinteger.
Find the inverse of h = {(5,1), (4, 8), (3, 7), (9, 3)}.
- {(5,1), (4, 8), (3, 7), (9, 3)}
- {(1, 5), (8, 4), (7, 3), (3, 9)}
- {(5, 4), (3, 9), (8, 7), (1, 3)}
- {(4, 5), (3, 8), (1, 9), (3, 3)}
Express the algebraic sum of sin 4x − sin x as a product.
- 2cos5xsin3x
- 2cos4xsin2x
c.
d.
____ 5.
____ 6.
____ 7.
____ 8.
Evaluate sin 54° cos 9° – cos 54° sin 9°. What is the value? a.
b.
c. 0.8910 d. 0.4540
Express the following product as an algebraic sum: cos28°cos34° a. 2[cos62° + cos6°]
b.
c.
d. cos62° + cos6°
[cos31° + cos12°] [cos62° + cos6°]
Findthesolutionsetof0≤x<2 intheinterval1−cosx=sinx. a. { ,2 }
b.
c. {0,2 } d. 0
Give the size and direction of the phase shift of the second equation relative to the first equation. y = 3 sin4x; y=3sin(4x–2 )
a.
b.
c.
d.
{0, }
to the left
to the right
to the left
to the right
____ 9.
Find the amplitude of the equation: .
- 1
- 2
c.
d. −1
____ 10.
a.
____ 11.
____ 12.
. What is the second step equal to?
- tan(44° + 16°)
- tan(44° − 16°)