" (d) Evaluate "(cos35^(@))/(sin55^(@))+(sin11^(@))/(cos79^(@))-cos28^(@)cosec62^(@)

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 ?

Without using Trigonometric Tables evaluate the following :- (cos35^@)/(sin55)+(sin11^@)/(cos79^@)-cos28^@ cosec62^@ .

Evaluate (sin35^(@))/(cos55^(@))+(sec20^(@))/("cosec"70^(@)) .

Evaluate (sin35^(@))/(cos55^(@))+(sec20^(@))/("cosec"70^(@)) .

(cos 28^(@))/(sin 62^(@))=?

Evaluate: (cos 55^(@))/(sin 35^(@))+(cot 35^(@))/(tan 55^(@))

(cos 28^(@))/(sin 62^@)=?

(cos 62^@)/(sin 28^@) =?

Evaluate: (cos 58^@)/(sin 32^@)+(sin 22^@)/(cos 68^@)-(cos 38^@cosec 52^@)/(tan 18^@tan 35 ^@ tan 60^@tan 72^@tan 55^@) .