sin(21)/(cos69^(@))

A=(cos9^(@)-sin9^(@))/(cos9^(@)+sin9^(@)),B=(cos21^(@)+sin21^(@))/(cos21^(@)-sin21^(@)) and C=tan20^(@)+tan40^(@)+sqrt(3)tan20^(@)tan40^(@) then descending order is

A=(cos9^(@)-sin9^(@))/(cos9^(@)+sin 9^(@)), B=(cos21^(@)+sin21^(@))/(cos21^(@)-sin21^(@)) and C=tan 20^(@)+tan 40^(@)+sqrt(3)tan20^(@)tan40^(@) then descending order is

Evaluate the following: (i) (sin21o)/(cos69o) (ii) (tan10o)/(cot80o) (iii) (sec11o)/(cos e c\ 79o)

Evaluate the following: (i) (sin21o)/(cos69o)( ii) (tan10o)/(cot80o)( iii) (sec11o)/(cos ec79o)

(The24^(@)cos6^(@)-sin6^(@)sin66^(@))/(sin21^(@)cos39^(@)-cos51^(@)sin69^(@)) is

The value of (sin24^(@)cos6^(@)-sin6^(@)sin66^(@))/(sin21^(@)cos39^(@)-cos51^(@)sin69^(@)) is

sin21^(@)cos9^(@)-cos84^(@) cos6^(@)=

Prove that sin21^(@)cos9^(@)-cos84^(@)cos6^(@)=1/4 .

What is the value of ((cos21^@)/(sin69^@))-((sin40^@)/(cos50^@)) ?