104. ա)sinαα-sin³α/cosα-cos³α=sinα∗(1-sin²α)/cosα(1-cos²α)=sinα∗cos²α/cosα∗sin²α=cosα/sinα=ctgα բ)sin³α-sin5α/cos³α-cos5α=sin³α(1-sin²α)/cos³α∗(1-cos²α)=sin³α∗cos²α/cos³α∗sin²α=sinα/cosα=tgα գ)tgαctgα-cos²α/sinα=1-cos²α/sinα=sin²α/sinα=sinα
104. ա)sinαα-sin³α/cosα-cos³α=sinα∗(1-sin²α)/cosα(1-cos²α)=sinα∗cos²α/cosα∗sin²α=cosα/sinα=ctgα բ)sin³α-sin5α/cos³α-cos5α=sin³α(1-sin²α)/cos³α∗(1-cos²α)=sin³α∗cos²α/cos³α∗sin²α=sinα/cosα=tgα գ)tgαctgα-cos²α/sinα=1-cos²α/sinα=sin²α/sinα=sinα