# Maths Flashcards

1

Q

sin 0°

A

0

2

Q

sin 30°

A

1/2

3

Q

sin 45°

A

√2/2

4

Q

sin 60°

A

√3/2

5

Q

sin 90°

A

1

6

Q

sin =

A

opposite / hypotenuse

7

Q

cos =

A

adjacent / hypotenuse

8

Q

tan =

A

opposite / adjacent

9

Q

tan-1(opp/adj) is an example of how to find..

A

an angle

10

Q

tan30 = opp/adj is an example of how to find..

A

a side

11

Q

Density =

A

Mass/volume

12

Q

Cosine rule

A

a² = b² +c² - (2bcCosA)

13

Q

Cosine rule for angles

A

CosA = b² + c² - a² / 2bc

14

Q

Area of triangle using trigonometry

A

1/2abSinC

15

Q

Sine rule

A

SinA/a = SinB/b = SinC/c

16

Q

x² - 25 factorised

A

(x+5)(x-5)

17

Q

Quadratic formula

A

−b ± √b² −4ac

_____________

2a

18

Q

Tan30

A

1/√3