Answer:
so your awnser would be
Step-by-step explanation:
Daddy
Step-by-step explanation:
Using that fact that,
![\cos(u) = \frac{x}{r}](https://tex.z-dn.net/?f=%20%5Ccos%28u%29%20%20%3D%20%20%5Cfrac%7Bx%7D%7Br%7D%20)
and
![{r}^{2} = {x}^{2} + {y}^{2}](https://tex.z-dn.net/?f=%20%7Br%7D%5E%7B2%7D%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20%2B%20%20%7By%7D%5E%7B2%7D%20)
We need to find sin which that formua is
![\sin(u) = \frac{y}{r}](https://tex.z-dn.net/?f=%20%5Csin%28u%29%20%20%3D%20%20%5Cfrac%7By%7D%7Br%7D%20)
We know what r and x is so we need to find y.
![{8}^{2} = { - 3}^{2} + {y}^{2}](https://tex.z-dn.net/?f=%20%7B8%7D%5E%7B2%7D%20%20%3D%20%20%7B%20-%203%7D%5E%7B2%7D%20%20%2B%20%20%7By%7D%5E%7B2%7D%20)
![64 = 9 + {y}^{2}](https://tex.z-dn.net/?f=64%20%3D%209%20%2B%20%20%7By%7D%5E%7B2%7D%20)
![55 = {y}^{2}](https://tex.z-dn.net/?f=55%20%3D%20%20%7By%7D%5E%7B2%7D%20)
![\sqrt{55} = y](https://tex.z-dn.net/?f=%20%5Csqrt%7B55%7D%20%20%3D%20y)
Sin is positve on the interval pi/2 to pi. so we get
![\sin(u) = \frac{ \sqrt{55} }{8}](https://tex.z-dn.net/?f=%20%5Csin%28u%29%20%20%3D%20%20%5Cfrac%7B%20%5Csqrt%7B55%7D%20%7D%7B8%7D%20)
b.
![\tan(u) = \frac{y}{x}](https://tex.z-dn.net/?f=%20%5Ctan%28u%29%20%20%3D%20%20%5Cfrac%7By%7D%7Bx%7D%20)
so
![\tan(u) = - \frac{ \sqrt{55} }{3}](https://tex.z-dn.net/?f=%20%5Ctan%28u%29%20%20%3D%20-%20%20%20%5Cfrac%7B%20%5Csqrt%7B55%7D%20%7D%7B3%7D%20)
c.
![\sec(u) = \frac{r}{ x}](https://tex.z-dn.net/?f=%20%5Csec%28u%29%20%20%3D%20%20%5Cfrac%7Br%7D%7B%20x%7D%20)
![\sec(u) = - \frac{8}{3}](https://tex.z-dn.net/?f=%20%5Csec%28u%29%20%20%3D%20-%20%20%20%5Cfrac%7B8%7D%7B3%7D%20)
d.
![\sin(2u) = 2 \sin(u) \cos(u)](https://tex.z-dn.net/?f=%20%5Csin%282u%29%20%20%3D%202%20%5Csin%28u%29%20%20%5Ccos%28u%29%20)
![2 ( \frac{ \sqrt{55} }{8} )( - \frac{3}{8} ) = \frac{ - 6 \sqrt{55} }{64} = \frac{ - 3 \sqrt{55} }{32}](https://tex.z-dn.net/?f=2%20%28%20%5Cfrac%7B%20%5Csqrt%7B55%7D%20%7D%7B8%7D%20%29%28%20-%20%20%5Cfrac%7B3%7D%7B8%7D%20%29%20%3D%20%20%5Cfrac%7B%20-%206%20%5Csqrt%7B55%7D%20%7D%7B64%7D%20%20%3D%20%20%5Cfrac%7B%20-%203%20%5Csqrt%7B55%7D%20%7D%7B32%7D%20)
e.
![\cos {}^{} (2u) = \cos {}^{2} (u) - \sin {}^{2} (u)](https://tex.z-dn.net/?f=%20%5Ccos%20%7B%7D%5E%7B%7D%20%282u%29%20%20%3D%20%20%5Ccos%20%7B%7D%5E%7B2%7D%20%28u%29%20%20-%20%20%5Csin%20%7B%7D%5E%7B2%7D%20%28u%29%20)
![( \frac{ - 3}{8} ) {}^{2} - ( \frac{ \sqrt{55} }{8} ) {}^{2} = \frac{ - 46}{64} = - \frac{23}{32}](https://tex.z-dn.net/?f=%28%20%5Cfrac%7B%20-%203%7D%7B8%7D%20%29%20%7B%7D%5E%7B2%7D%20%20-%20%28%20%5Cfrac%7B%20%5Csqrt%7B55%7D%20%7D%7B8%7D%20%29%20%7B%7D%5E%7B2%7D%20%20%3D%20%20%5Cfrac%7B%20%20-%2046%7D%7B64%7D%20%20%3D%20%20-%20%20%5Cfrac%7B23%7D%7B32%7D%20)
Answer:
<h2><u><em>
Area = 120 in²</em></u></h2>
<u><em></em></u>
Step-by-step explanation:
follow the formula in the picture
Area = b * h
Area = 15 * 8
Area = 120 in²
Answer:
False
Step-by-step explanation:
I'm pretty sure you're asking if the question is true or false and in this case, it is not true.
20^2+6(9+3)=274
evaluate power
400+6(9+3)=274
multiply numbers
400+72=274
add numbers
472=274
they are not the same number which means that statement wasn't true
Answer:
7/8
Step-by-step explanation:
power of 1/2 is the same as square root.
√(49/64) = 7/8 since 7/8 * 7/8 = 7*7/8*8 = 49/64