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# Scared of trig indentities watch

1. A Level maths has been a breeze so far. Trig identities are the only thing that stood out. I feel like I could spend hours on a stupid problem and not find the answer. I feel like there are so many directions you can take to make an identity into another form. Everything is just guessing.

Any recommendations on what I can do to get better?
2. (Original post by mojos)
A Level maths has been a breeze so far. Trig identities are the only thing that stood out. I feel like I could spend hours on a stupid problem and not find the answer. I feel like there are so many directions you can take to make an identity into another form. Everything is just guessing.

Any recommendations on what I can do to get better?
No need to be scared, I don't think a disguised number 1 will break into your house and murder you, so you can sleep tight.

Anyway, as far as trig identities go, yes you can express an identity in many forms, however it's not 'guessing', but rather it's 'spotting'. And the more comfortable you are with the identities, the better you become at spotting them in expressions. So just practice them.
3. Well there's usually only one direction to make an expression simpler. One trick that you may find useful is that if you've been asked to prove expression A is identical to B then write down A - B and try to show it's zero.
4. (Original post by mojos)
A Level maths has been a breeze so far. Trig identities are the only thing that stood out. I feel like I could spend hours on a stupid problem and not find the answer. I feel like there are so many directions you can take to make an identity into another form. Everything is just guessing.

Any recommendations on what I can do to get better?
They can be really mean sometimes but nothing to be scared of

I think it's just a case of spotting things that can be rewritten in different terms. This is definitely a skill that takes practice (a lot of practice usually!) but you will get there! Once you learn the rules and get better at spotting what you need to do quickly you'll be just fine

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Updated: November 14, 2017
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