" 12."sin48^(@)sec42^(@)+cos48^(@)cosec42^(@)=

sin48^(@)sec42^(@)+cos48^(@)csc42^(@)=

Find the value of sin 48^(@) sec 42^(@)+cos48^(@) "cosec"42^(@).

sin42^(@)sec48^(@)+cos42^(@)cos ec48^(@)=2

cos48^(@)*cos12^(@)=

cos48^(@)*cos12^(@)=

Show that: sin 42^(@)sec 48^(@)+cos 42^(@)cosec 48^(@)=2

cos48^(@)cos23^(@)cos ec42^(@)cos ec67^(@)=1

Show that : (i) tan 10^(@) tan 15^(@) tan 75^(@) tan 80^(@) = 1 (ii) sin 42^(@) sec 48^(@) + cos 42^(@) "cosec 48"^(@) = 2

Evaluate: i) sin48^(@)cos42^(@)+cos48^(@)sin42^(@) ii) cos72^(@)cos12^(@)+sin72^(@)sin12^(@) ii) cos72^(@)cos12^(@)+sin72^(@)sin12^(@) iii) (tan100^(@)+tan35^(@))/(1-tan100^(@)tan35^(@)) iv) sinAcos(A-B)-cosAsin(A-B)

Evaluate: i) sin48^(@)cos42^(@)+cos48^(@)sin42^(@) ii) cos72^(@)cos12^(@)+sin72^(@)sin12^(@) ii) cos72^(@)cos12^(@)+sin72^(@)sin12^(@) iii) (tan100^(@)+tan35^(@))/(1-tan100^(@)tan35^(@)) iv) sinAcos(A-B)-cosAsin(A-B)