Answer:
Cos 2x+sin x = cos x cos x - sin x sin x + sin x
Step-by-step explanation:
Cos 2x+sin x
use Trigonometric identities.
cos (2x) = cos (x + x) = cos x cos x - sin x sin x
Cos 2x+sin x = cos x cos x - sin x sin x + sin x
1/2 + 2x = (3+4+12)x / 12
1/2 + 2x = 19x/12
1/2 = -5/2 x
x = -1/5
Answer:
C
Step-by-step explanation:
These pairs are both interior angles and are consecutive because they are divided by a transversal.
Answer: 7
Step-by-step explanation:
3(x+2)=27
Step 1: Simplify both sides of the equation.
3(x+2)=27
(3)(x)+(3)(2)=27(Distribute)
3x+6=27
Step 2: Subtract 6 from both sides.
3x+6−6=27−6
3x=21
Step 3: Divide both sides by 3.
3x/3=21/3
x=7
