Verify the identity.sin 
= -cos x
What will be an ideal response?
sin 
= sin 
cos x - cos 
sin x = (-1) ? cos x - 0 ? sin x = -cos x
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Find the domain of the given function f and find where it is increasing and decreasing, and also where it is concave upward and where it is concave downward. Identify all extreme values and points of inflection. Then sketch the graph of y = f(x). f(x) = ln(2x + 5)
What will be an ideal response?
7
? 3
A. 25
B. 21
C. 24
D. 26
Solve the problem.The path of a projectile fired at an inclination ? (in degrees) to the horizontal with an initial speed v0 is a parabola. The maximum height H of the projectile is given by H = 
(1 - cos (2?))where g is the acceleration due to gravity.Show that the maximum height H can be written H = 
What will be an ideal response?
Use the addition property of equality to solve the equation.x + 1 = 19
A. 
B. 20
C. 18
D. -18