2. Chapter 5,6,7 Flashcards
1
Q
360 in radians
A
2 pi
2
Q
180
A
p
3
Q
one radian
A
180/ pi
4
Q
30
A
pi/6
5
Q
45
A
pi / 4
6
Q
how do you find the length of an arc?
A
r x theta
7
Q
How do you find the area of an arc?
A
1/2 r^2 theta
8
Q
For small values sin theta =
A
theta
9
Q
For small values cos theta
A
1- theta^2 / 2
10
Q
For small values tan theta
A
theta
11
Q
Sec x
A
1/ cos x
12
Q
Cosec x
A
1/ sin x
13
Q
cot x
A
1/ tan x or cosx/sinx
14
Q
sin(2A)
A
2 sinAcosA
15
Q
Cos(2A)
A
cos^2 A - sin^2 A
