Homework Help Forum: Trigonometry

Posted by Edan on Thursday, November 5, 2009 at 6:38pm.

1.Using exact values, verify that cos 60°=1-2 sinē 30°

• Trigonometry - bobpursley, Thursday, November 5, 2009 at 6:47pm

  I am not certain what I am seeing. Is it cos^2 60=1-2sin^2 30 ? 3/4=?=1-2*1/4 so it doesn't verify...so I must not be seeing the type clearly

  
  

• Trigonometry - Edan, Friday, November 6, 2009 at 12:01am

  This is exacly how the question goes, This is a test question. 1.Using exact values, verify that cos 60°=1-2 sinē 30°

  
  

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