Solve the equation on the interval 0 ? ? < 2?.cos2 ? - 1 = 0
A. 
B. 
C. {0, ?}
D. {0}
Answer: C
Mathematics
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Frank's algebra grade is based on the average of four exams, which will count equally. His grades are 75, 80, 70 and 85. Find his average.
A. 72.5 B. 77.5 C. 82.5 D. 92.5 E. 87.5
Mathematics
Determine if the equation is a proportion.
A. Yes B. No
Mathematics
Graph the function.y = 3x2 + 6
A. 
B. 
C. 
D. 
Mathematics
Verify the identity.
= 
What will be an ideal response?
Mathematics