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# Core 3- Trig

1. [sec(x) - 1 ]/tan(x) = [ tan (x)]/ sec(x) +1

So, i have to prove this identity is true. Ive managed to show it by dividing both sides by one of the sides, however i cant think how to start from either the left or right, and work myself to the other side. Any help would be awesome
2. (Original post by antonio108)
[sec(x) - 1 ]/tan(x) = [ tan (x)]/ sec(x) +1

So, i have to prove this identity is true. Ive managed to show it by dividing both sides by one of the sides, however i cant think how to start from either the left or right, and work myself to the other side. Any help would be awesome

LHS =

3. Several methods, here is mine.

4. Ah thank you very much, just looking through and slowly realising what i have to look out for.
Again, thanks!

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