Evaluate :
`sin25^(@)cos65^(@)+cos25^(@)sin65^(@)`

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

Evaluate the following and justify your answer. sin 5^(@) cos 85^(@) +cos 5^(@) sin 85^(@)

Evaluate (tan65^(@))/(cot25^(@))

Evaluate each of the following : sin30^(@)cos45^(@)+cos30^(@)sin45^(@)

Find the value of : (i) sin 30^(@)+cos 60^(@) (ii) sin 0^(@)-cos 0^(@) (iii) tan 45^(@)- tan 37^(@) (iv) sin 390^(@) (v) cos 405^(@) (vi) tan 420^(@) (vii) sin 150^(@) (viii) cos 120^(@) (ix) tan 135^(@) (x) sin (330^(@)) (xi) cos 300^(@) (xii) sin (-30^(@)) (xiii) cos (-60^(@)) (xiv) tan (-45^(@)) (xv) sin (-150^(@))

Prove that, sin51^(@)+cos81^(@)=cos21^(@)

Evaluate cos 12^(@) -sin 78^(@)

Evaluate: ((sin47^(@))/(cos43^(@)))^(2)+((cos43^(@))/(sin47^(@)))^(2)-4cos^(2)45^(@)

Evaluate : (sin^(2)63^(@)+sin^(2)27^(@))/(cos^(2)17^(@)+cos^(2)73^(@))