Which of the following was recommended in NCTM's Professional Standards for Teaching Mathematics?
a. Toward classrooms as mathematical communities – away from classrooms as simply a collection of individuals
b. Toward logic and mathematical evidence as verification – away from the teacher as the sole authority for right answers
c. Toward mathematical reasoning – away from merely memorizing procedures
d. All of the above
e. None of the above
Ans: d
Mathematics
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Find 
.y = 
A. 
B. 
C. 
D. 
Mathematics
Simplify the given expression by giving the results in terms of one-half the given angle. Then use a calculator to verify the result.
A. 0.891 B. 0.642 C. 1.782 D. 1.2601
Mathematics
Simplify the complex fraction.
A. 
B. 
C. 
D. 
Mathematics
Write the fraction as a decimal. Write repeating decimals with as few digits as possible.
A. 0.
B. 0.09
C. 0.
D. 0.0
Mathematics