3cos80^(@)cosec10^(@)+2sin59^(@)sec31^(@)

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

Evaluate : (sin 80^(@))/(cos 10^(@))+sin 59^(@)sec 31^(@)

Evaluate : (i) 3 cos 80^(@) "cosec 10"^(@) + 2 sin 59^(@) sec 31^(@) (ii) (cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@)) - 8 sin^(2) 30^(@) (iii) "cosec" (65^(@) + A) - sec(25^(@) - A)

Consider the following : 1. (cos 75^(@))/(sin 15^(@)) + (sin 12^(@))/(cos 78^(@)) - (cos 18^(@))/(sin 72^(@)) =1 2. (cos 35^(@))/(sin 55^(@)) - (sin 11^(@))/(9cos 79^(@)) + cos 28^(@) "cosec" 62^(@) =1 3. (sin 80^(@))/(cos 10^(@)) - sin 59^(@).sec 31^(@) =0 Which of the above are correct ?

The value ((cos9^(@)+sin81^(@))(sec9^(@)+cosec81^(@)))/(sin56^(@) sec34^(@)+cos25^(@)cosec65^(@)) is :

Prove that : (cos80^(@))/(sin10^(@))+cos59^(@)cosec31^(@)=2

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

(cos80^(@))/(sin10^(@))+cos59^(@)cos ec31^(@)=2