11.10.3
Which of the following functions illustrates a change in amplitude?
y=-2cos6x
Which function's graph has a period of 2?
y=-4sinπx
The graph below represents which of the following functions?
y=3sin(2(x-π/3))
Which of the following is a sinusoid?
y=cos(x)-2
Which graph represents a phase shift of pi/2 units left for the graph of y=sinx
y=cosx
Which function has the range (-inifitity, 0]u[2,infinity)
y=csc(x) + 1
Which function has a domain of all real numbers except x=(pi/2) ± n(pi)
y=secx
Which is a true statement about a 45-45-90 triangle?
The hypotenuse is √2 times as long as either leg
cot^2x - csc^2x = -1 for all values of x.
True
Use the squared identities to simplify 2sin^2x sin^2x.
(3-4cos(2x)+cos(4x))/4
What is the minimum value that the graph of y=sinx assumes?
-1
Which is the equivalent of 172.98° written in DMS form?
172° 58'48"
1+cos(12x)=_.
2cos^2(6x)
What is the circumference of a circular amphitheater with a diameter of 300 meters?
942.5 m
if ∆EFG, mE=30, mF=60, and mG=90. Which of the following statements about ∆EFG are true?
EF=2*FG EG=(√3/2)*EF EG=√3 * FG
sin(-x) = -cos(x) for all values of x.
False
Which description matches the transformations y=cos undergoes to produce y=3cos(-2x)?
Horizontal compression by factor 1/2, reflection through the y-axis, then vertical stretch by factor 3.
Which function's graph has asymptotes located at the values x=(pi//2) ± n(pi)
I and III only
The statement "cotx = 12/5, secx = -13/5
cannot be true because cotx is less than zero in quadrant 2.`
___ cosb = 1/2[sin(a+b) + sin(a-b)]
sina
Which of the following would be an acceptable first step in simplifying the expression sinx/ 1-cosx
sinx(1+cosx))/(1-cosx)(1+cosx)
Assuming cos t=.45 and cos w=.89 both t and w are positive, and both t and w determine a terminal point in quadrant 1, then which of the following statements best describes the relationship between t and w.
t>w
Angle of elevation ~ 2* Distance between observer and building ~ 5280 Find the height of the building
tan2=x/5280 x=184.38