Find the value of `Sin70^(@)/Cos20^(@)`

Find the value of sin10^(@).sin30^(@).sin50^(@).sin70^(@) .

Find the value of : 3 sin^(2) 20^(@) - 2 tan^(2) 45^(@) + 3 sin^(2) 70^(@) .

Find the value of "cosec"70^(@)-sec20^(@)

Find the value of 3sin20^(@)-4sin^(3)20^(@).

Find the value of ((tan20^(@))/(cos e)c70^(@))^(2)+((cot20^(@))/(sec70^(@)))^(2)+2tan75^(@)tan45^(@)tan15^(@)

Find the value of (cos^(2)20^(@)+cos^(2)70^(@))/(sin^(2)59^(@)+sin^(2)31^(@)) .

What is the value of ((cos10^(@)+sin20^(@)))/((cos20^(@)-sin10^(@))) ?

If sin20^(@)=p, " then find the value of " ((sin380^(@)-sin340^(@))/(cos380^(@)+cos340^(@))) .

If sin2A=2sinA cosAand sin20^(@)=K, " then the value of " cos20^(@)cos80^(@)cos160^(@) =__________.