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
19
Q
Tan 45
A
1
20
Q
Tan60
A
√3
21
Q
Cos30
A
√3/2
22
Q
Angle at centre theorem
A
The angle at the centre is twice the size the angle at the circumference
23
Q
The angle in a semi - circle is
A
A right angle
24
Q
Angles in the same segments are
A
Equal