" (iii) "cosec31^(@)-sec59^(@)

Evaluate: (iv) cosec 31^(@)-sec 59^(@)

cos ec31 ^ (@) - sec59 ^ (@)

cosec15^(@)+sec15^(@)=

Evaluate : "cosec" 31^(@) - sec 59^(@)

Evaluate : "cosec "31^(@)-sec 59^(@) .

Evaluate : cosec 31^(@) - sec 59^(@)

Without using trigonometric tables, evaluate : (i) cos 48^@-sin42^@ (ii) cosec31^@-sec59^@ (iii) cot 34^@-tan56^@ (iv) cos^2 13^@-sin^2 77^@

"cosec" 15^(@) + sec 15^(@) =

Evaluate: cosec31^(@)-sec59^(@)

Evaluate cosec 31^(@) -sec 59^(@)