Evaluate.sin2 45° + cos2 45°
A. 0
B. 
C. 2
D. 1
Answer: D
Mathematics
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Provide an appropriate response.At the two points where the curve x2 - xy + y2 = 9 crosses the x-axis, the tangents to the curve are parallel. What is the common slope of these tangents?
A. 2 B. 1 C. -2 D. -1
Mathematics
Solve the problem.The output voltage of a generator is given by 
Express the voltage as the sum of a sine and a cosine function.
A. V = 79 cos 2?ft + 79 sin 2?ft
B. V = 79
cos 2?ft - 79 sin 2?ft
C. V = 79
sin 2?ft + 79 cos 2?ft
D. V = 79
cos 2?ft + 79 sin 2?ft
Mathematics
Graph the linear inequality.x ? -1
A. 
B. 
C. 
D. 
Mathematics
Find the square root. Express the answer as a whole number or as a square root. Do not use a calculator.
A. 3 B. 21 C. 15 D. 8
Mathematics