Ch5 Radians Flashcards

1
Q

π radians

A

180 degrees

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

2π radians

A

360 degrees

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

1 radian

A

180/π

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

30 degrees

A

π/6 radians

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

45 degrees

A

π/4 radians

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

60 degrees

A

π/3 radians

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

90 degrees

A

π/2 radians

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

arc length

A

l = r x angle in radians

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

Area of sector

A

A =1/2 r^2 x angle in radians

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

sinθ when θ is small and in radians

A

sinθ ~ θ

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

cosθ when θ is small and in radians

A

cosθ ~ 1-(θ^2/2)

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

tanθ when θ is small and in radians

A

tanθ ~ θ

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