As usual, when faced with a newformula, it is a good idea to try it on familiar objects to be sure itgives results consistent with past experience. Use the length formulain Equation (3) to calculate the circumferences of the followingcircles (a > 0). r = a sin θ
Ratios
A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.
Trigonometric Ratios
Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.
As usual, when faced with a new
formula, it is a good idea to try it on familiar objects to be sure it
gives results consistent with past experience. Use the length formula
in Equation (3) to calculate the circumferences of the following
circles (a > 0). r = a sin θ
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