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# exact forms of trig ratios for 30, 60 & 45 degrees... watch

1. can anyone tell me the exact forms of trig ratios for 30, 60 & 45 degrees...
thanks x
2. work it out yourself.
3. (Original post by fashiongirly)
can anyone tell me the exact forms of trig ratios for 30, 60 & 45 degrees...
thanks x
Draw a triangle and work it out.
4. cheers
5. sin 30 = 0.5 = cos60
sin45 = (sqrt2)/2 = cos 45
sin 60 = (sqrt3)/2 = cos 30

tan30 = 1/sqrt3
tan60 = sqrt3
tan45 = 1

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Updated: February 5, 2006
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