trippylxe trippylxe
  • 02-11-2016
  • Mathematics
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Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.
cos^4(x)

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mozarth11
mozarth11 mozarth11
  • 02-11-2016
cos^4(x) = 
(cos²x)² = 
(1-sen²x)² = 
1² - 2*1*sen²x + sen^4x = 
1 - 2sen²x + sen^4x
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