Prove that d/dx (csc (x)) = -csc(x)*cot(x). Fill in the blanks
step 1: d/dx(csc(x))=(d/dx)(1/blank)
step 2: =(blank)(0)-1(blank)
step 3: (blank)/(sin^2x)
step 4: -(1/sin x)*(blank/sin x)
step 5: = -csc(x)*cot(x)