- #1
cse63146
- 452
- 0
[SOLVED] A Trigonometric Identity Probelm
If I have [tex]sin^2 2x[/tex] would I be able to apply the identity [tex]sin^2x = (1/2)(1-cos2x)[/tex] to get this:
[tex]sin^2 2x = 2(1/2)(1 - cos^2 x)[/tex]
Similarly, if I had [tex]sin^2 2x + cos^2 2x[/tex] would I be able to use the identity [tex]sin^2 x + cos^2 x = 1[/tex] to get:
[tex]sin^2 2x + cos^2 2x = 2[/tex]
If I have [tex]sin^2 2x[/tex] would I be able to apply the identity [tex]sin^2x = (1/2)(1-cos2x)[/tex] to get this:
[tex]sin^2 2x = 2(1/2)(1 - cos^2 x)[/tex]
Similarly, if I had [tex]sin^2 2x + cos^2 2x[/tex] would I be able to use the identity [tex]sin^2 x + cos^2 x = 1[/tex] to get:
[tex]sin^2 2x + cos^2 2x = 2[/tex]
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