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Maths Year Ten COPY > Triganometry > Flashcards

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

The top of the bride is point A, the bottom of the bridge is point B, a point in the middle of the road is C. What is the angle of elevation between the bride and the road?

The distance between point A and point C