Verify the identity.cos 
= -sin ?
What will be an ideal response?
cos 
= cos 
cos ? + sin 
sin ? = 0 ? cos ? - 1 ? sin ? = - sin ?
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Find an equation of the tangent line at the indicated point on the graph of the function.y = f(x) = 2
- x + 9, (x, y) = (4, 9)
A. y = - 
x + 11
B. y = - 
x + 9
C. y = 9
D. y = 
x - 11
Write the radical in exponential form and then simplify. Write the answer in exponential form.
? 
A. x1/2 B. x5/18 C. x7/12 D. x11/6
Multiply and simplify.(cos x - sin x)2
A. cos2x + 2 sin2x B. 1 C. 1 - 2 sin x cos x D. cos2x + 2 sin x - sin2x
Solve the problem.Earth is represented on a map of the solar system so that its surface is a circle with the equation 
A weather satellite circles 0.5 units above the Earth with the center of its circular orbit at the center of the Earth. Find the general form of the equation for the orbit of the satellite on this map.
A. x2 + y2 + 4x + 10y + 28.75 = 0 B. x2 + y2 + 4x + 10y - 35.75 = 0 C. x2 + y2 + 4x + 10y - 4261.25 = 0 D. x2 + y2 - 4x - 10y - 4261.25 = 0