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Evaluate: i) `sin48^(@)cos42^(@)+cos48^(@)sin42^(@)` ii) `cos72^(@)cos12^(@)+sin72^(@)sin12^(@)` ii) `cos72^(@)cos12^(@)+sin72^(@)sin12^(@)` iii) `(ta

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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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i) 1, ii) `1/2`, iii) `-1`, iv) sinB
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