Use the Half-angle Formulas to find the exact value of the trigonometric function. cos 22.5°
A. 
B. - 
C. - 
D. 
Answer: A
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David Company borrowed $550,000 on December 31, 2014. The loan will be paid with six equal annual payments of $115,388, beginning on December 31, 2015. The rate of interest compounded annually for the loan is most nearly equal to
A. 9%. B. 8%. C. 7%. D. 6%.
Establish the identity.
+ 
= 2 tan 2 x
What will be an ideal response?
Benito conducts an experiment in which group A is exposed to a particular treatment and group B is given no treatment. If group A is designated as the treatment group, then what is group B designated as?
A. independent variable B. dependent variable C. control group D. treatment group
Adults demonstrating excessive activities such as eating, talking, or chewing gum may be experiencing what type of fixation?
A. anal B. oral C. phallic D. psychosexual