Sin 2 x + sin x = 0
( sin 2 x = 2 sin x cos x )
2 sin x cos x + sin x = 0
sin x ( 2 cos x + 1 ) = 0
sin x = 0
x 1 = 0
x 2 = π
or: 2 cos x + 1 = 0
2 cos x = - 1
cos x = -1/2
x 3 = 2π/3
x 4 = 4π/3
Answer:
8 =x
Step-by-step explanation:
- 18 = -3x + 6
Subtract 6 from each side
-18-6 = -3x+6-6
-24 = -3x
Divide each side by -3
-24/-3 = -3x/-3
8 =x
F = (9/5 * 49) + 32
F = 88.2 + 32 = 120.2
F= 120.2
Answer:
The answer is 7.
Step-by-step explanation:
You just have to substitute the -1 into the equation.
5 - 2(-1) = 5 + 2 = 7 ...... the -2 turns into a plus because a negative times a negative always equals a positive.
