von Ivy Orchid » Di Jul 31, 2012 3:11 am
Important Angles: 30°, 45° and 60°
You should try to remember sin, cos and tan for the angles 30°, 45° and 60°.
Yes, it is a pain to have to remember things, but it will make life easier when you know them, not just in exams, but other times when you need to do quick estimates, etc.
These are the values you should remember!
Angle
30° Sin = 1/2 Cos = √3/2 Tan = √3/3
45° Sin = √2/2 Cos = √2/2 Tan = 1
60° Sin = √3/2 Cos = 1/2 Tan = √3
Hope this helps.
<3 Ivy
Re: math