Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Transform the equation to a form without an xy-term by a rotation of axes and then identify the curve.x2 + 4xy - 2y2 = 7
A. 
x'2 - 
y'2 = 1; parabola
B. 
x'2 - 
y'2 = 1; hyperbola
C. 
x'2 + 
y'2 = 1; hyperbola
D. 
x'2 - 
y'2 = 1; hyperbola
Mathematics
Find the value of the expression.
A. 
B. 
C. 
D. 
Mathematics
Use the information given about the angle ? to find the exact value of the indicated trigonometric function.sin ? = 
, 0 < ? < 
Find sin 
.
A. 
B. 
C. 
D. 
Mathematics
Write as a decimal.104%
A. 0.104 B. 1.04 C. 1.05 D. 10.4
Mathematics