Answer:
2cos^2u--1
1--2sin^2u
cos^2u--sin^2u
Step-by-step explanation:
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4x=20 the answer is x=5
X/7=2 the answer is x=14
3x=2 the answer is x=2/3
X/2=7 the answer is x=14
Answer: Anthony
Step-by-step explanation: |7| = 7, and |-7| = 7.
Answer:
They are similar for their radii, and perimeters have the same ratio: 2
Step-by-step explanation:
The similarity of circles is proved, when we can compare the ratio, between the two radii and the two perimeter and it is the same.
2. The Circle X, has a radius of 6 and the circle Y has the radius of 3.
So let's do it:

3. Now let's check the Perimeters:
4. In addition to this, we can do this Geometrically, by inserting the Circle Y within the Circle X, and if dilate by the scale factor of 2 we'll have these two circumferences coincide.