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Inverse Trig

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Mao:

--- Quote from: unknown id on March 09, 2008, 02:58:45 pm ---i thought that whenever we have to prove that the left side equals the right side, only the left side should be used in our calculations

--- End quote ---
however (more realistically), if you can arrive at 0=0 by any means, it'll be eureka! regardless

i have since edited my post to include a second proof with your preferred "only involve the left side" :P
even though the beginnning step is not

unknown id:
thanks mao, the second method does seem more preferable :D

gfb:
Good work Mao ;).

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