Use half-angle formulas to find the exact value for the following:
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: C
Mathematics
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Evaluate the given binomial coefficient.
A. 203
B. 20,910
C. 
D. 41,820
Mathematics
Find the exact value of the expression.tan 870°
A. - 
B. 
C. 1
D. - 
Mathematics
Find the probability of the compound event.Two 6-sided dice are rolled. What is the probability the sum of the two numbers on the die will be 3?
A. 
B. 
C. 
D. 2
Mathematics
Solve the system by the substitution method.x2 + y2 = 21y2 = 2x + 13
A. (2, 
), (-4, 
), (2, -
), (-4, -
)
B. (2, 
), (-3, 
), (2, -
), (-3, -
)
C. (3, 
), (-4, 
), (3, -
), (-4, -
)
D. (2, 3
), (-4, 3
), (2, -3
), (-4, -3
)
Mathematics