Solve the problem.What is the domain of the cosine function?
A. all real numbers, except integral multiples of ? (180°)
B. all real numbers, except odd multiples of 
(90°)
C. all real numbers
D. all real numbers from -1 to 1, inclusive
Answer: C
Mathematics
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Solve the equation and check your solution.
- 
= 9
A. x = 36 B. x = 180 C. x = 20 D. x = 45
Mathematics
Write the expression in the form a + bi, where a and b are real numbers.
A. -5i B. 5 C. 5i D. 25i
Mathematics
Find z1z2. Express the answer in standard form.z1 = 3
z2 = 5
A. -15i B. 15 C. 15i D. -15
Mathematics
Write the rate as a fraction in simplest form.66 hours for 16 projects
A. 
B. 
C. 
D. 
Mathematics