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##### Asked by: Peña Bile

science space and astronomy# How do you know when to use Sohcahtoa?

Last Updated: 21st February, 2020

**know**which sides, and that is where "

**sohcahtoa**" helps.

Sine, Cosine and Tangent.

Sine: | soh | sin(θ) = opposite / hypotenuse |
---|---|---|

Tangent: | toa | tan(θ) = opposite / adjacent |

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Also question is, how do you know when to use Sin Cos or tan?

If you have the hypotenuse and the opposite side, then **use sine**. If you have the hypotenuse and the adjacent side, then **use cosine**. If you have the adjacent and the opposite sides, then **use** tangent.

Also Know, how is sin calculated? **Sine** (**sin**) function - Trigonometry. In a right triangle, the **sine** of an angle is the length of the opposite side divided by the length of the hypotenuse. In any right triangle, the **sine** of an angle x is the length of the opposite side (O) divided by the length of the hypotenuse (H).

Furthermore, how do you remember Sin Cos Tan?

An alternate way to **remember** the letters for **Sin**, **Cos**, and **Tan** is to **memorize** the nonsense syllables Oh, Ah, Oh-Ah (i.e. /o? ? ˈo?. ?/) for O/H, A/H, O/A. Or, to **remember** all six functions, **Sin**, **Cos**, **Tan**, Cot, Sec, and Csc, **memorize** the syllables O/H, A/H, Oh/Ah, Ah/Oh, H/A, H/O (i.e. /o? ? ˈo?.

How do you do tangent?

**Example**

- Step 1 The two sides we know are Opposite (300) and Adjacent (400).
- Step 2 SOHCAHTOA tells us we must use Tangent.
- Step 3 Calculate Opposite/Adjacent = 300/400 = 0.75.
- Step 4 Find the angle from your calculator using tan
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