## How do you know when to use SOH CAH and Toa?

The mnemonic SOHCAHTOA can be used to aid in remembering which function to use in what circumstance – SOH stands for Sine is opposite over hypotenuse; CAH stands for Cosine is adjacent over hypotenuse; and TOA stands for Tangent is opposite over adjacent. This will save confusion when working with these functions.

## What triangles can you use SOH CAH TOA for?

Q: Is sohcahtoa only for right triangles? A: Yes, it only applies to right triangles. If we have an oblique triangle, then we can’t assume these trig ratios will work.

## What is the Sohcahtoa formula?

“SOHCAHTOA” is a helpful mnemonic for remembering the definitions of the trigonometric functions sine, cosine, and tangent i.e., sine equals opposite over hypotenuse, cosine equals adjacent over hypotenuse, and tangent equals opposite over adjacent, (1) (2)

## How do you find the missing side of a triangle?

Given two sides
1. if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root: a = âˆš(cÂ² – bÂ²)
2. if leg b is unknown, then. b = âˆš(cÂ² – aÂ²)
3. for hypotenuse c missing, the formula is. c = âˆš(aÂ² + bÂ²)

## Is SOH CAH TOA only for right triangles?

For right-angled triangles, we have Pythagoras’ Theorem and SOHCAHTOA. However, these methods do not work for non-right angled triangles. For non-right angled triangles, we have the cosine rule, the sine rule and a new expression for finding area.

## What is the sine of Î¸?

Formulas for right triangles

If Î¸ is one of the acute angles in a triangle, then the sine of theta is the ratio of the opposite side to the hypotenuse, the cosine is the ratio of the adjacent side to the hypotenuse, and the tangent is the ratio of the opposite side to the adjacent side.

## What is the sum of all 3 sides of a triangle?

Answer: The sum of the lengths of the three sides of a triangle is called its perimeter.