So you have the ratio of 9:2.
The video has 18 thumbs up votes with the ratio being thumbs up to thumbs down.
9 in relation to 18 is times 2 so it makes since to times 2 by 2.
Therefore the ratio would be 18:4 which means there would be 4 thumbs down.
Answer:
D. Pythagorean
Step-by-step explanation:
Given the identity
cos²x - sin²x = 2 cos²x - 1.
To show that the identity is true, we need to show that the left hand side is equal to right hand side or vice versa.
Starting from the left hand side
cos²x - sin²x ... 1
According to Pythagoras theorem, we know that x²+y² = r² in a right angled triangle. Coverting this to polar form, we have:
x = rcostheta
y = rsintheta
Substituting into the Pythagoras firnuka we have
(rcostheta)²+(rsintheta)² = r²
r²cos²theta+r²sin²theta = r²
r²(cos²theta+sin²theta) = r²
(cos²theta+sin²theta) = 1
sin²theta = 1 - cos²theta
sin²x = 1-cos²x ... 2
Substituting equation 2 into 1 we have;
= cos²x-(1-cos²x)
= cos²x-1+cos²x
= 2cos²x-1 (RHS)
This shows that cos²x -sin²x = 2cos²x-1 with the aid of PYTHAGORAS THEOREM
It means that you can pay your utility bill for example using internet banking.
To find the inverse, interchange the variables and solve for y.
f^-1 (x) = 4 + x/2
5.972 × 10<span>21.
Hope this helps.</span>
