Find the value of `2 sec 10^@×cos 10^@`

Find the value of 8 cos10^(@)cos20^(@)cos40^(@) .

Find the value of 2/(10/3)

The value of 2 sec10^(@)xxcos10^(@) is .

Find the value of sec^(2)10^(@)-cot^(2)80^(@)+(sin15^(@)cos75^(@)+cos15^(@)sin75^(@))/(costhetasin(90^(@)-theta)+sinthetacos(90^(@)-theta)) .

What is the value of |(sin 10^(@)-cos 10^(@)),(sin 80^(@),cos 80^(@))| ?

Find the value of cosec 10^(@) - sqrt(3) sec 10^(@) .

Find the exact value of cos ec10^(@)+cos ec50^(@)-cos ec70^(@)

Find the exact value of cos ec10^(@)+cos ec50^(@)-cos ec70^(@)

Find the value of : sec(cos^(-1)(2/3))