The Student Room Group
Reply 1
maybe

or draw 2 triangles,
1st - angles of 90, 60, 30 and then the lengths 1,2, root 3
2nd - angles of 45, 45, 90 and lengths of 1,1, and root 2
then use trig to work out the angles
Reply 2
thats certainly the best way or you could do what i did and learn to reaconise the decimal expansions from the calc. lol
Reply 3
Due to the sheer number of times you'll come across them it's best to just learn the trig values for 0,30,45,60,90. Doesn't take much to learn them but it will save you a lot of time.

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