((cot^2theta)/(1+csctheta))=((1-sin theta)/(sintheta))

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b