The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the value of the indicated trigonometric function at t.
?Find tan t.
A. 
B. 
C. 
D. 
Answer: A
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Use the appropriate sum or difference identity to write the given expression as a function of x alone.cos (270° - x)
A. - sin x B. cos x C. sin x D. - cos x
Provide an appropriate response.Which of the following statements defines 
f(x) = ??I. For every positive real number B there exists a corresponding ? > 0 such that f(x) > B whenever x0 - ? < x < x0 + ?.II. For every positive real number B there exists a corresponding ? > 0 such that f(x) > B whenever x0 < x < x0 + ?.III. For every positive real number B there exists a corresponding ? > 0 such that f(x) > B whenever x0 - ? < x < x0.
A. II B. III C. I D. None
Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
A. 
i
B. - 
C. - 
- 
i
D. - 
+ 
i
Simplify the expression:
a. 23 b. 13 c. -13 d. 4