` cosec 31^@ - sec 59 ^@ ` = ?

cosec 23^@ - sec 67^@

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

Evaluate : co s e c31^@-sec59^@ .

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

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

Evaluate 3 cos 80 ^(@) cosec 10 ^(@) + 2 cos 59 ^(@) cosec 31 ^(@)

Evaluate : 3 cos 80^@ cosec 10^@ + 2 cos 59^@ cosec 31^@

((cos 9^@+sin 81^@)(sec 9^@+ cosec 81^@))/(sin 56^@ sec 34^@+ cos 25^@ cosec 65^@) =?

cosec 60^@. Sec 60^@ =………..