Answer:
I DESERVE BRAINLIEST
Step-by-step explanation:
C=5.5*2*PI
C=11*pi
C=34.5575191895
C= 34.56
A=pi*5.5^2
A=30.25*Pi
A= 95.0331777711
A= 95.03
The awnser to that question is 80000
Answer:
sin(-a)= -15 /17
Step-by-step explanation:
Alright, lets remember that sin(x) is odd function, which means that
wherever you watch an expression like this: sin(-a), you can use the odd functions property, and turn it like the following
sin(-a)= - sin(a)
Now, other thing to remember: ![(sin(x))^{2}+(cos(x))^{2}=1](https://tex.z-dn.net/?f=%28sin%28x%29%29%5E%7B2%7D%2B%28cos%28x%29%29%5E%7B2%7D%3D1)
So, we can obtain any value for sin(x) function starting from the opposite function, cos(x), using the following:
![sin(x)=\sqrt{1-(cos(x))^{2} }](https://tex.z-dn.net/?f=sin%28x%29%3D%5Csqrt%7B1-%28cos%28x%29%29%5E%7B2%7D%20%7D)
So, if cos(a)= - 8 / 17, using the above equation we obtain the value for sin(a)
![sin(a)=\sqrt{1 - (cos(a))^{2} } = \sqrt{1 - ( \frac{8}{17} )^{2} }= \sqrt{\frac{225}{289} } =15/17](https://tex.z-dn.net/?f=sin%28a%29%3D%5Csqrt%7B1%20-%20%28cos%28a%29%29%5E%7B2%7D%20%7D%20%3D%20%5Csqrt%7B1%20-%20%28%20%5Cfrac%7B8%7D%7B17%7D%20%29%5E%7B2%7D%20%20%7D%3D%20%5Csqrt%7B%5Cfrac%7B225%7D%7B289%7D%20%7D%20%20%3D15%2F17)
Using the odd function property, we get the following result
sin(-a)= - sin(a) = -15/17