" (iv) "csc31^(@)-sec59

Evaluate: (iv) 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^@

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

Evaluate the following: (i) cos e c\ 31^@-sec59^@ (ii) (sin72^@+cos18^@)(sin72^@-cos18^@)

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

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

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

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

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