Evaluate: `i^80`

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)

Evaluate sin 10^(@)sec80^(@)+4tan45^(@) .

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

Evaluate: 50 times (-5) +540 div [100-{80-(20 times 2)}]

Evaluate: (2 tan 54^(@))/(cot 36^(@))-(cot80^(@))/(tan 10^(@))

Evaluate: (2tan 53^(@))/(cot 37^(@))-(cot 80^(@))/(tan 10^(@))

Evaluate: (2tan 53^(@))/(cot 37^(@))-(cot 80^(@))/(tan 10^(@))

Evaluate (i) /(2-i).

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

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