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Single Trigonometric Functions ( trig identities)

  • Thread starter imxaxpunk
  • Start date
  • #1
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Homework Statement



Cos^2x-Sin^2x/2 SinxCosx



The Attempt at a Solution



I changed cos^2x to 1- sin^2x

which then the equation was 1- s sin^2x/2snxcosx and i have no idea how to make this a single trig. function
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
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If you can't see it immediately then, what is 1-2sin2x the same as? What is 2sinxcosx the same as?

Hint: Look up your double angle formulas.
 
  • #3
119
0
**Hint**

[tex]sin(a+b)=sina \cdot cosb+sinb \cdot cosa[/tex]

What if a and b where the same number...
 

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