" (in) "cos48^(@)-sin42^(@)quad " (ix) "csc31^(@)-sec59^(@)

Evalute (c ) cos48^(@)-sin42^(@)

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

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

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

Evaluate : (i) (sin18^@)/(cos72^@) (ii) (tan26^@)/(cot64^@) (iii) cos48^@-sin42^@ (iv) c o s e c 31^@sec59^@

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

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