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Evaluate: i) sin48^(@)cos42^(@)+cos48^...

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)`

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

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

Evaluate: (sin18^(@))/(cos72^(@))

(sin48^(@))/(cos42^(@))+(cos48^(@))/(sin42^(@))=2

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

Evalute: (b) (sin18^(@))/(cos72^(@))

Prove that : (i) sin42^(@)cos48^(@)+sin48^(@)cos42^(@)=1 (ii) cos70^(@)cos20^(@)-sin70^(@)sin20^(@)=0

Prove that : (i) sin42^(@)cos48^(@)+sin48^(@)cos42^(@)=1 (ii) cos70^(@)cos20^(@)-sin70^(@)sin20^(@)=0

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