Express the trigonometric function in terms of the same function of a positive acute angle.cos 193°
A. cos 58°
B. -cos 58°
C. -cos 13°
D. cos 13°
Answer: C
Mathematics
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Determine the amplitude and find the phase shift in radians (to the nearest tenth).y = 
sin x + 
cos x
A. 
, -0.3
B. 
, 0.3
C. 
, -0.3
D. 
, 0.3
Mathematics
Find the foci of the given hyperbola.
- 
= 1
A. (-12, 4), (20, 4) B. (4, -12), (4, 20) C. (4, -16), (4, 24) D. (4, 24), (4, -16)
Mathematics
Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.f(x) = sin4 x
A. 
- 
cos 2x + 
cos 4x
B. 
+ 
cos 2x
C. 
- 
cos 2x
D. 
- 2 cos 2x + 
cos 4x
Mathematics
A right triangle with acute angle ? is given. Evaluate the indicated trigonometric function of the acute angle ?.Find sec ?.
A. 
B. 
C. 
D. 
Mathematics