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## Homework Statement

I have been practicing proving trig. ident. for the past couple of days... although I am getting better... I wanted to ask are there any strategies that I should be aware of to make the process easier ?

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- Thread starter Miike012
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I have been practicing proving trig. ident. for the past couple of days... although I am getting better... I wanted to ask are there any strategies that I should be aware of to make the process easier ?

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symbolipoint

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Ive been studying the trig identities for the past three days... Ive memorized sin, cos, tan, cosec, sec, and cot, and their reciprocal. And tan = sin/cos and cot = cos/sin

and sin^2 + cos^2 = 1

and sec^2 = 1 + tan

and cosec^2 = i + cot....

I know many of them... are there more I should memorize....?

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tiny-tim

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sin(x+y) = SinxCosy + CosxSiny

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tiny-tim

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(later, you'll find that sin and cos, particularly, turn up all over the place, not just in geometry, so its quite usual to see sinx or sint )

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