SEARCH HOME
 Math Central Quandaries & Queries
 Question from Agnes, a student: How I can solve this question : Simplify (4- 4cos^4 x)/(sin^2 x) and write in terms of sin x

Hi Agnes,

I can help with some hints.

• Take out the common factor in the numerator.

• Look for a difference of squares to factor.

• Use the fact that $\sin^2 x + \cos^2 x = 1.$

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.