`(cos 12^@-sin12^@)/(cos12^@+sin12^@) + (sin147^@)/(cos 147^@)=`

(cos12^@-sin12^@)/(cos12^@+sin12^@)+sin147^@/(cos147^@)=

(cos12^(@)-sin12^(@))/(cos12^(@)+sin12^(@))+(sin147^(@))/(cos147^(@))=

(cos 12^(@) - sin 12^(@))/(cos 12^(@) + sin 12) + (sin 147^(@))/(cos 147^(@))=

(cos 12^(@) - sin 12^(@))/(cos 12^(@) + sin 12) + (sin 147^(@))/(cos 147^(@))= ................... A) 1 B) -1 C) 0 D) sqrt3

Select and write the correct answer from the given alternatives in each of the following: (frac(cos12-sin12)(cos12+sin12))+(frac(sin147)(cos147)) =

If (cos 12^@ + sin 12^@)/(cos 12^@ -sin 12^@)=tan x^@ , what is the value of x.

If tan theta =(cos 12^@ + sin 12^(@))/(cos 12^(@)-sin12^(@)) " then " theta =

Cos^(-1)(cos12) -Sin^(-1) (sin12)=

(sin12A)/(sin4A)-(cos12A)/(cos4A)=

(sin12A)/(sin4A)-(cos12A)/(cos4A)=