Trigonometry (1) Flashcards

1
Q

Convert degrees to radians

A

Divide by 180, multiply by pi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Divide by 180, multiply by pi

A

Convert degrees to radians

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Convert radians to degrees

A

Divide by pi, multiply by 180

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Divide by pi, multiply by 180

A

Convert radians to degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Pythagoras theorem

A

a^2 + b^2 = c^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

a^2 + b^2 = c^2

A

Pythagoras theorem

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Get trig values from triangle

A

Put in sin(30), should equal 1/2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Put in sin(30), should equal 1/2

A

Get trig values from triangle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a unit circle?

A

A circle with radius 1, at origin 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A circle with radius 1, at origin 0

A

What is a unit circle?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Find arc length of sector

A

Length = radius * pheta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Length = radius * pheta

A

Find arc length of sector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Find the area of a sector

A

Area = 1/2 * r^2 * pheta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Area = 1/2 * r^2 * pheta

A

Find the area of a sector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The sine rule

A

a/sinA = b/sinB = c/sinC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

a/sinA = b/sinB = c/sinC

A

The sine rule

17
Q

The cosine rule

A

a^2 = b^2 + c^2 - 2bc * cosA

18
Q

a^2 = b^2 + c^2 - 2bc * cosA

A

The cosine rule

19
Q

The cosine rule for an angle

A

cosA = (b^2 + c^2 - a^2)/2bc

20
Q

cosA = (b^2 + c^2 - a^2)/2bc

A

The cosine rule for an angle

21
Q

Solve 2 sin x + 5 cos x = R sin (x + a)

A

2 sin x + 5 cos x = R sin x cos a + R cos x sin a

R cos a = 2 and R sin a = 5

tan^-1 (5/2)

¬(2^2 + 5^2) = ¬29

¬29 sin (x + 68.2degrees)