(tan50^(@)+sec50^(@))/(cot40^(@)+cosec40^(@))+cos40^(@)*cosec50^(@)

Without using trigonometric tables, evaluate: (tan 50^(@)+sec50^(@))/(cot40^(@)+cosec40^(@))+cos 40^(@)cosec 50^(@)

(cot50^(@))/(tan40^(@))

Find the value of (sin 50^(@))/(cos40^(@))+("cosec"40^(@))/(sec 50^(@))-4cos 50^(@) " cosec"40^(@).

Evaluate: sec 50^(@) sin 40^(@)+cos 40^(@) cosec 50^(@) .

Solve (sin40^(@))/(cos50^(@))+(csc40^(@))/(sec50^(@))

Without using trigonometric tables,find the value of ((sin50^(@))/(cos40^(@)))+((cos ec40^(@))/(sec50^(@)))-4cos50^(@)cos ec40^(@)

Evaluate : sin50^(@)cos40^(@)+cos40^(@)+cos50^(@)sin40^(@)

Evaluate : sin50^(@)cos40^(@)+cos40^(@)+cos50^(@)sin40^(@)