What is the first step in finding a missing side of a right triangle using trigonometric functions?

Identify which trigonometric function to use.

Explain why you need to multiply both sides of the equation by 'x' when 'x' is in the denominator of a trigonometric equation.

To isolate 'x' and remove it from the denominator so it can be solved for.

I can use the Pythagorean theorem to find the missing side length of a right triangle.

1
The acronym SOH CAH TOA is a helpful way to remember the trigonometric ratios: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.
2
To find a missing side of a right triangle using trigonometry, first identify the angle and the two sides you are given, then choose the appropriate trigonometric function.
3
If the variable is in the denominator, you must multiply both sides by the variable before isolating it; if the variable is in the numerator, you must multiply both sides by the denominator to isolate the variable.