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# A level maths Trig watch

2. Use the identity you have written below to get rid of either the sin^2 or the cos^2 term. That is, rearrange the identity and then subsitute. Then solve by rearranging and square rooting. Now you can find values for theta.
3. Is that an = or : in top line
4. (Original post by Sacheroo)
Is that an = or : in top line
It’s an = sorry my handwriting is not very clear
5. (Original post by Hannahkisley)
If you divide both sides by cos^2(x) you will end up with tan^2(x) = 2 from the identity sin/cos = tan

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Updated: November 9, 2017
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