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

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 ?

Evaluate 2(cos^(2)28^(@)-sin^(2)62^(@)) .

cos56^(@)+cos58^(@)-cos66^(@)-4cos28^(@)cos29^(@)sin33^(@)=

Find the value of cos28^(@).cos32^(@)-sin28^(@).sin32^(@) :

(1+cos56^(@)+cos58^(@)-cos66^(@))/(cos28^(@)cos29^(@)sin33^(@))=

If cos56^(0)+cos58^(0)-cos66^(0)-4cos28^(0)-cos29^(@)sin33^(@)=lambda then |2 lambda|=

(1-(cos61^(@))/(cos1^(@)))(1-(cos62^(@))/(cos2^(@)))(1-(cos63^(@))/(cos3^(@)))...(1-(cos119^(@))/(cos59^(@)))

(sin^(3)A+cos^(3)A)/(sin A+cos A)+(sin^(3)A-cos^(3)A)/(sin A-cos A)=2

If 1+cos56^(0)+cos58^(0)-cos66^(0)=k cos28^(0)cos29^(@)sin33^(@) then the value of k is

What is the value ofLsin 34Â^@ cos 236 -sin 56Â^@ sin 124Â^@COs 28Â^@ cos 88Â^@+ cos 178Â^@ sin 208Â^@(a) -2124(b) -1(c) 2(90(d) 1