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# How to use special triangles to solve trig watch

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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Updated: June 17, 2016
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