### 1. inverse

**adjective.** ['ˌɪnˈvɝːs'] reversed (turned backward) in order or nature or effect.

#### Synonyms

- backward

#### Antonyms

- nonreciprocal
- agonist

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### 2. inverse

**noun.** ['ˌɪnˈvɝːs'] something inverted in sequence or character or effect.

#### Synonyms

- reciprocal
- multiplicative inverse
- oppositeness
- opposition
- opposite

#### Antonyms

- alternate
- synchronise
- falsify
- stay

### 3. inverse

**adjective.** ['ˌɪnˈvɝːs'] opposite in nature or effect or relation to another quantity.

#### Antonyms

- synonym

### 4. cosine

**noun.** ratio of the adjacent side to the hypotenuse of a right-angled triangle.

#### Synonyms

- cos
- trigonometric function

### Example sentences of the word inverse-cosine

1. **Noun Phrase**

Enter this number into your calculator and press the **inverse cosine** (also known as arccos) function on your calculator to display the value of the angle.

2. **Noun Phrase**

Evaluate the **inverse cosine** of the ratio of the adjacent side to the hypotenuse with a scientific calculator.

3. **Noun Phrase**

For example, if the adjacent side is 1 and the hypotenuse is 2, you will calculate the **inverse cosine** of 1/2.

4. **Noun Phrase**

Calculating the angle requires that you use either the inverse sine, **inverse cosine** or inverse tangent function on a calculator.