Use the addition formulas to derive the identity.sin 
= -cos x
What will be an ideal response?
sin 
= sin x cos 
+ cos x sin 
= sin x (0) + cos x (-1)
= 0 - cos x
= -cos x
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Solve the equation.7.1m + 2m - m = 30.78
A. 7.1 B. 3.8 C. 8.1 D. 38
Find the x- and y-intercepts of f.f(x) = (x + 1)(x - 8)(x - 1)2
A. x-intercepts: -1, 1, -8; y-intercept: -8 B. x-intercepts: -1, 1, -8; y-intercept: 8 C. x-intercepts: -1, 1, 8; y-intercept: 8 D. x-intercepts: -1, 1, 8; y-intercept: -8
Use elimination to solve each system of equations, if possible. Identify the system as consistent or inconsistent. If the system is consistent, state whether the equations are dependent or independent. -6x - 4y = -422x + 2y = 14
A. (7, 1); consistent and independent B. (7, 0); consistent and independent C. (6, 1); consistent and independent D. infinitely many solutions and dependent
Find the area of the triangle having the given measurements. Round to the nearest square unit.A = 27°, b = 14 inches, c = 5 inches
A. 33 square inches B. 14 square inches C. 31 square inches D. 16 square inches