Here is number three...
First factor a sin(x) out of the numerator...
Then using the Pythagorean theorem we can say 1-cos^2x=sin^2x...
from there you can simplify to sin(x)
I am having difficulties simplifying trigonometric expressions. My textbook isn't much help and I don't have a teacher to ask, so I thought maybe someone here could help me.
Some examples of questions I'm not really sure about are:
1) sinx / tanxcosx
The answer I got for this one simply "1".
2) sin(^4)x + (sin(^2)x)(cos(^2))
This one I got "sinx(^4)x + 1"
3)
sinx - (sinx)(cos(^2)x)
------------------------
sin(^2)x
I am lost on this one.
Any help would be greatly appreciated.