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
You might also like to view...
An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to determine the maximum value of the objective function and the values of x and y for which the maximum occurs.Objective Functionz = 24x + 16yConstraints0 ? x ? 10 0 ? y ? 5 3x + 2y ? 6
A. Maximum: 80; at (0, 5) B. Maximum: 240; at (10, 0) C. Maximum: 320; at (10, 5) D. Maximum: 48; at (0, 3)
Solve the problem.If 
is a convergent series of nonnegative terms, what can be said about 
, where k is a positive integer?
A. Always diverges B. May converge or diverge C. Always converges
Perform the operation.
A. 23 B. 19 R5 C. 19 R4 D. 19
Find the domain and the range of the functions or relations from the graph.
A. domain: (-?, ?); range: (-?, -6] B. domain: (-?, ?); range: (-?, 1) C. domain: (-?, ?); range: (1, ?) D. domain: (-?, ?); range: (-?, 1]