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# A level trigonomentry watch

1. I'm managing okay with trigonometry so far but this question has me stumped. Not even really sure how i'd start it. I thought it might be something to do with Sinx/Cosx = Tanx?

Screen Shot 2018-03-14 at 17.21.42
2. (Original post by Emsio8)
I'm managing okay with trigonometry so far but this question has me stumped. Not even really sure how i'd start it. I thought it might be something to do with Sinx/Cosx = Tanx?

Screen Shot 2018-03-14 at 17.21.42
3. Which question?
4. (Original post by Edgemaster)
Which question?
I guess part a. If I know how to do the first one I could probably work out the rest. Thanks.
5. Use the fact that sin^2(x) + cos^2(x)=1
6. (Original post by Emsio8)
I guess part a. If I know how to do the first one I could probably work out the rest. Thanks.
Use the identity cos^2(x)+sin^2(x)=1.

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Updated: March 14, 2018
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