For this problem we're supposed to prove/verify that: √((1-cosx)/(1+cosx)) = (1-cosx)/|sinx| Also, if someone could explain why the sinx in the right side has to be absolute value, that would be appreciated. Thank you
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basic algebra ...
Thank you, I understand the proof now! A little clarification in this matter: |a| = √a^2 is this because its a^2 and not (-a)^2? (So if it were (-a)^2 it'd be -|a| ?) Thanks!
Originally Posted by SMA777 Thank you, I understand the proof now! A little clarification in this matter: |a| = √a^2 is this because its a^2 and not (-a)^2? (So if it were (-a)^2 it'd be -|a| ?) Thanks! There are always two square roots to any number. i.e. or Notice that both answers have a "size" of . This "size" is denoted with an absolute value. So is correct, because it's saying the answer is something of "size" .
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