The trick here is to not use sin and cos at all.
The -13/15 is the x coordinate of a line from the origin to the unit circle (the line with angle theta). That happens to be the cos(theta).
The y coordinate is the sin(theta).
You can draw this as a triangle where x^2 + y^2 = 1.
So y = √(1 - (13/15)^2) ≈ 0.49889. But your exact answer should be:
If this makes sense lol... <span>C = 2πr ≈ 2(3.14)(4.3) ≈ 27.02 m. An object travels in a circle of </span>radius 4.3<span>m at constant speed. It takes 1.4 seconds to go around once</span>
When converting decimals to a percentage, simply move the decimal point 2 places to the right
example: .45 to percent
move decimal(or dot) to the right 2 times and you get....
45%
I hope this helps!
Use Slader.com, Find the math book and look up the page. It will show you the answer and how to get it.
The correct answer is "Linear Pair Theorem". The theorem states that if 2 angles make a linear pair, then they are supplementary (add up to 180).