Posted by Anonymous on Saturday, February 16, 2013 at 3:48am.
not true, so it can't be proven the way you typed it
probably needs brackets
counterexample:
let x = 30°
LS = 1 + sin60° - cos60°/sin60° + cos60°
= 1 + √3/2 - (1/2) / (√3/2) + 1/2
= 3/2 + √3/2 - 1/√3
RS = tan 30 = 1/√3 ≠ LS
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