Are you saying...
When solving , how can you get a fractional answer rather than some nasty decimal?
I was wondering if someone could help me out with how to change a cosine into fractional from: example cos 45 = sqrt2/2 and cos 150 = sqrt3/2
I know that if I take the inverse of the cosine decimal form I can take the answer do square it, make a fraction out of it with the sqrt of the square dived by the squared number. that gets really messy as well though.
They are my favourite triangles. Commit them to memory and you will be a trig-wiz!
Special Triangles
Essentially your construct a triangle with angles 60-30-90 and 45-45-90
Special right triangles - Wikipedia, the free encyclopedia