Solve the equation.
+ 
= 
A. {-6}
B. {0}
C. {5}
D. ?
Answer: D
Mathematics
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Find the exact value under the given conditions.sin ? = 
, 
< ? < ?; cos ? = 
, 0 < ? < 
Find sin (? - ?).
A. - 
B. 
C. 
D. 
Mathematics
Solve.
(x + 6) = 
(x + 8)
A. x = -12 B. x = -4 C. x = 3 D. x = 4
Mathematics
Solve the system by elimination.5x - 8y = -202x + 7y = 43
A. (4, 5) B. No solution C. (-4, 5) D. (-8, -3)
Mathematics
A point on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function.(15, 20)Find cos ?.
A. 
B. 
C. 
D. 
Mathematics