Use the addition formulas to derive the identity.cos 
= sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= cos x (0) - sin x (-1)
= 0 + sin x
= sin x
Mathematics
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Given y = f(u) and u = g(x), find dy/dx = f'(g(x))g'(x).y = u(u - 1), u = x2 + x
A. 2x2 + 4x + 1 B. 4x3 + 6x2 - 1 C. 2x2 + 4x D. 4x3 + 6x2 - 2x
Mathematics
Solve the problem. Round to the nearest cent.Winco Enterprise, Inc. bought a new computer system. To pay for the system, they borrowed 
at 
interest for 160 days. Find the interest owed. (Use a 365 day year.)
A. $938.13 B. $3752.50 C. $1579.13 D. $1644.93
Mathematics
Use both properties of equality to solve the equation.8c + 1 = -89 - 10c
A. -5 B. -6 C. -4 D. 5
Mathematics
Match the equation to the correct graph.y = -(x + 4)2 + 6
A. 
B. 
C. 
D. 
Mathematics