Answer:
C. 
Step-by-step explanation:
Please find the attachment.
We have been given that secants AC and DB intersect at point E inside the circle. Given that the measure of arc 
, arc 
, and arc 
. We are asked to find the measure of angle AED.
We know that the measure of angle formed by two intersecting secants is half the sum of measure of the arcs by intercepted by the angle and its vertical angle.
Let us find measure of arc AD by subtracting measure of given arcs from 360 degrees as:
Therefore, measure of angle AED is 130 degrees and option C is the correct choice.
Answer:
x=4
y=0
Step-by-step explanation:
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
Answer:
one of the answers is E,F
Step-by-step explanation:
I know this becuase that is a pyramid right there it is an solid but no prims or anything else on there
The ratio 12:20 because you need it to be equal to 3:5. 3 times 4 which makes 12 so you need to multiply 5 with 4 too
