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Verifying Trig Identities

  • Thread starter xCycLoNeX
  • Start date
  • #1
2
0

Homework Statement



sin^3(x)-cos^3(x)
sin(x) - cos(x)

equals

1 + sin(x) + cos(x)

Homework Equations


Not sure :/


The Attempt at a Solution


Not sure where to even start.
 

Answers and Replies

  • #2
461
8
Are you sure that it's 1+sin(x)+cos(x) and not 1+sin(x)cos(x)?

Use the identity sin^2(x)+cos^2(x)=1.
 
  • #3
2
0
Oh yeah, that was it.
 
  • #4
48
0
sin^3(x)-cos^3(x)
-----------------
sin(x) - cos(x)

Try factoring the numerator, it may help you.
 

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