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(cas48)/(1)cos42-(sin48')/(2)*sin42'...

(cas48)/(1)cos42-(sin48')/(2)*sin42'

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The value of cos48^(@)cos42^(2)-sin48^(@)sin42^(@) is:

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

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

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

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

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

Evaluate the following: ( i ) ((sin49o)/(cos410))^(2)+((cos410)/(sin49o))^(2) (ii) cos48o-sin42o

value of (sin9^(@)cos9^(@))/(sin48^(@)sin12^(@)) is equal to :

(sin9^(@)-cos9^(@))/(sin48^(@)sin 12^(@))=