1
Q
What is the value of Sin, cos and tan when at 0’
A
Sin = 0 Cos= 1 tan = 0
2
Q
What is the value of Sin, cos and tan when at 30’
A
Sin = 1/2 cos= [root 3]/2 tan= 1/[root 3]
3
Q
What is the value of Sin, cos and tan when at 45’
A
sin = [root 2]/2 cos = [root 2]/2 tan = 1
4
Q
What is the value of Sin, cos and tan when at 60 ‘
A
sin = [root 3]/2 cos = 1/2 tan = [root 3]
5
Q
What is the value of Sin, cos and tan when at 90’
A
sin = 1
cos = 0
tan doesn’t exist
6
Q
How do you calculate sin x?
A
O/H
7
Q
How do you calculate cos x?
A
A/H
8
Q
how do you calculate tan x?
A
O/A
9
Q
Sine/cosine =
A
Tan
10
Q
What is the easy method for remembering?
A
for sin, 4,3,2,1,0 square root divided by 2
for cos, 0,1,2,3,4 square root divided by 2
