Flashcards in Triganometry Deck (15)

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1

## What is the equation for Sin?

### Sin feta = opposite / hypotenuse

2

## What is the equation for Cos?

### Cos feta + adjacent / hypotenuse

3

## What is the equation for Tan?

### Tan feta + opposite / adjacent

4

## What's the mnemonic for reminding sin, cos and tan?

### SOHCAHTOA

5

##
|. \

|. \

100m |. \

|. \

|____150m______\

Work out the angle of depression

###
Tan feta = Opposite / adjacent = 150/100 = 1.5

Tan -1 (150/100) = feta = 56.3

[Calculator entry: tan -1 (150/100

Answer: 56.3

6

## When finding an angle when using trigonometry what do you use?

### Sin-1 / cos-1 / tan-1

7

##
|. \

|. \

a |. \

|. \

|____15m ___(50*\

Work out side a

###
Tan feta = opposite / adjacent

Tan 50 = a/15

Rearrange

Calculator : tan (50) x 15

A = 17.9

8

## What is cos 60*

### 1/2

9

## What is tan 60*

### Square root of a third

10

## What is sin 60*?

### Square root of 3/2

11

## What is cos 45*?

### 1/ square root of 2

12

## What is sin 45*?

### 1/ square root of 2

13

## What is tan 45*?

### 1

14

## What shape does the angle of elevation form?

### A triangle

15