Question

s 1 05 1 -1.5 -05 0.5 1 -0.5 -1.5 If the cosine of in this unit circle is a, what would be true of the cosine of in a circle with a radius of 2?

Answer 1

In the unit circle

`\cos ^2x+\sin ^2x=1`
`x^2+y^2=r^2`

Where r is the radius of the circle

x- coordinate represents cos angle

cos angle = x/r

Since r = 2

cos angle = x/2

y-coordinate represents sin angle

sin angle = y/r

sin angle = y/2

Because the question is incomplete

we can not find which is true