`cos38^(@)cos52^(@)-sin38^(@)sin52^(@)=0`

The value of cos38^(@)cos52^(@)-sin38^(@)sin52^(@) is :

Find the value of: (i)tan90^@ (ii) cos38^@cos52^@-sin38^@sin52^@

Show that : cos 38^@ cos 52^@-sin 38^@ sin 52^@ = 0

Show that : (i) tan\ 48^@ tan 23^@\ tan 42^@tan 67^@=1 (ii) cos 38^@\ cos 52^@ - sin 38^@ sin 52^@=0

cos 38^(@) cos 8^(@) + sin 38^(@)sin 8^(@) is equal to

cos 38^(@) cos 8^(@) + sin 38^(@)sin 8^(@) is equal to ................ A) cos 30^(@) B) cos 60^(@) C) cos 45^(@) D) cos 38^(@)

Evaluate : cos 38^@ cos 52^@ - sin 38^@ sin 52^@ .

sin38^(@)+sin22^(@)=sin82^(@)

Show that : cos 38 ^@ cos 52 ^@ - sin 38^@ sin 52 ^@ = 0

(2sin38^(@))/(cos52^(@))