Homework Help Forum: Trigonometry

Posted by Laura on Wednesday, October 28, 2009 at 3:19pm.

prove:(cscx-cotx)^4 x (cscx+cotx)^4 = 1

• Trigonometry - Reiny, Wednesday, October 28, 2009 at 3:33pm

  LS = [(cscx - cotx)(cscx + cotx)]^4 = [csc^2x - cot^2x]^4 = [1 + cot^2x - cot^2x]^4 = [1]^4 = 1 = RS

  
  

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