cos48^(@)-sin42=...

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

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

Evaluate : cos 48^@-sin 42^@

cos 48^@ - sin 42 ^@ = ?

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

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

sin48^(@)sec42^(@)+cos48^(@)csc42^(@)=

Find the value of cos42^(@)-sin48^(@) .

cos^(2)48^(@)-sin^(2)12^(@)=?