(iii) cos 48° - sin 42°

Evaluate : (i) (sin18^@)/(cos72^@) (ii) (tan26^@)/(cot64^@) (iii) cos48^@-sin42^@ (iv) c o s e c 31^@sec59^@

Evaluate : (i) (sin18o)/(cos72o) (ii) (tan26o)/(cot64o) (iii) cos48o-sin42o (iv) "c o s e c 31osec""""59o"

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

Evaluate:(iii) Cos48^@-Sin42^@

Evaluate the following: (i) ((sin49^@)/(cos41^@))^2+((cos41^@)/(sin49^@))^2 (ii) cos48^@-sin42^@

Without using trigonometric tables, evaluate : (i) cos 48^@-sin42^@ (ii) cosec31^@-sec59^@ (iii) cot 34^@-tan56^@ (iv) cos^2 13^@-sin^2 77^@

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

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

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

The value of (sin pi) / (48) - (sin (5 pi)) / (48) + (sin (9 pi)) / (48) - (sin (13 pi)) / (48) (cos pi ) / ((cos pi) / (48) - (cos (5 pi)) / (48) - (cos (9 pi)) / (48) + (cos (13 pi)) / (48)) is