- #1
kLPantera
- 43
- 0
lim as x-> 0 (2-cos3x-cos4x)/(x).
I'm not sure how the numerator became (1-cos3x)(1-cos4x)/(x)
What am I missing? Could someone please point it out? Is it a trignometric factoring formula I'm not thinking of?
I'm not sure how the numerator became (1-cos3x)(1-cos4x)/(x)
What am I missing? Could someone please point it out? Is it a trignometric factoring formula I'm not thinking of?