Use the fundamental identities to simplify the expression.cos (-x) cos x - sin (-x) sin x
A. cos2x sin2x
B. 0
C. 2
D. 1
Answer: D
Mathematics
You might also like to view...
Convert the units using unit fractions.24 c = 
pt
A. 12 B. 192 C. 96 D. 48
Mathematics
Find percent notation for the number in decimal notation.0.12 of seniors at Elmwood High School spend more than two hours per day on the Internet.
A. 0.0012% B. 120% C. 12% D. 1.2%
Mathematics
Determine if the given value is a solution to the equation.3(x - 1) - x = 4x + 6; x = -4
A. Yes B. No
Mathematics
Use synthetic division to show that the number given to the right of the equation is a solution of the equation, then solve the polynomial equation.3x3 - 8x2 - 13x + 30 = 0; 3
A. 
B. 
C. 
D. 
Mathematics