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# How to use special triangles to solve trig

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1. need help with 5a using special triangles cheers
2. (Original post by coconut64)
need help with 5a using special triangles cheers
Here's one of the special triangles:

Using the triangle, if sin x = sqrt(3)/2, what is x?

Then how can you use that to solve sin 2x = sqrt(3)/2 ?
3. (Original post by notnek)
Here's one of the special triangles:

Using the triangle, if sin x = sqrt(3)/2, what is x?

Then how can you use that to solve sin 2x = sqrt(3)/2 ?
Hi, I have drawn something like this as well and I only got 1/6 pi rads. But I want the range from 0-2pi, this method only gives me one answer though... Thanks
4. (Original post by coconut64)
Hi, I have drawn something like this as well and I only got 1/6 pi rads. But I want the range from 0-2pi, this method only gives me one answer though... Thanks
Oh right I didn't realise this was an A Level question (I assume it is?).

Well how do you normally get extra solutions once you've found one solution?
5. (Original post by notnek)
Oh right I didn't realise this was an A Level question (I assume it is?).

Well how do you normally get extra solutions once you've found one solution?
Thanks. I know what to do now.

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