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Evaluate cos 48^(@) cos 42^(@) - sin48^(...

Evaluate `cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)`

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Evaluate : cos 48^(@) - sin 42^(@)

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

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

sin12^(@)sin48^(@)sin54^(@)=

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)

sin12^(0)sin48^(@)sin54^(@)=

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