ANSWER
![\cos(150 \degree) = - \frac{ \sqrt{3} }{2}](https://tex.z-dn.net/?f=%5Ccos%28150%20%5Cdegree%29%20%20%3D%20%20%20%20-%20%20%5Cfrac%7B%20%5Csqrt%7B3%7D%20%7D%7B2%7D%20)
EXPLANATION
We want to find the exact value of cos(150°).
150° makes an angle of 30° with the positive direction of the x-axis and it is also in the second quadrant.
The cosine ratio is negative in the second quadrant.
Using the unit circle,
![\cos(150 \degree) = - \cos(30 \degree) = - \frac{ \sqrt{3} }{2}](https://tex.z-dn.net/?f=%20%20%5Ccos%28150%20%5Cdegree%29%20%20%3D%20%20-%20%5Ccos%2830%20%5Cdegree%29%20%3D%20%20%20-%20%20%5Cfrac%7B%20%5Csqrt%7B3%7D%20%7D%7B2%7D%20)
i think its 25 because of the Pythagorean theorem. 4^2 + 3^2= 16 + 9 =25
When you find the square root of 25 its 5
Answer:
$1256.85
Step-by-step explanation:
1140 (1.05) = $1197 cost
$1197* 1.05 = 5% profit
1 and 2 i can't answer without proper data.
3. x+2x+2x+6 = 86
5x+6 = 86
-6 -6
5x = 80
x = 16
Side one: x is 16
Side two: 2x is 2(16) = 32
Side three: 2x+6 is 38