1-cos^2x/sin^x

Question

can someone please show me how to simplify this. multiply choices are 1)1

2)-1 3)sinx 4)cosx

Answer 1

Do you mean (1-cos²x)/sin²x ?

sin²x+cos²x=1 is a trig identity

therefore sin²x=1-cos²x

substituting

sin²x/sin²x=1, answer 1)