Find an equation for the graph.
A. y = -3 cos 
B. y = -3 sin (3x)
C. y = -3 cos (3x)
D. y = 3 cos 
Answer: A
Mathematics
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Write an equation of the line.
A. y = - 3x
B. y = 
x
C. y = 3x
D. y = - 
x
Mathematics
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find cos ?.
A. cos ? = 
B. cos ? = 
C. cos ? = 
D. cos ? = 
Mathematics
Solve.The three angles in a triangle always add up to 180°. If one angle in a triangle is 72° and the second is 5 times the third, what are the three angles?
A. 72°, 89°, 19° B. 72°, 88°, 20° C. 72°, 90°, 18° D. 72°, 91°, 17°
Mathematics
Simplify the expression. Write your answer without negative exponents. Whenever an exponent is negative or zero, assume that the base is not zero.x ? x9
A. x9 B. 2x10 C. 2x9 D. x10
Mathematics