`sin10 5^(@)+cos10 5^(@)=`

What is the value of (cos10^(@)-sin10^(@))/(cos10^(@)+sin10^(@)) ?

(cos10^(@)-sin10^(@))/(cos10^(@)+sin10^(@))" is "

Prove the following identities: (cos10^(@)-sin10^(@))/(cos10^(@) + sin10^(@))=tan 35^(@)

Prove that (cos10^(@)-sin10^(@))/(cos10^(@)+sin10^(@))=tan35^(@)

Prove that (cos10^(@)+sin10^(@))/(cos10^(@)-sin10^(@))=tan55^(@)

The value of (cos 10^(@) + sin 10^(@))/(cos 10^(@) -sin 10^(@))is-

(cos 10^(@) - sin 10^(@))/(cos 10^(@) + sin 10^(@)) is

1+ cos 10^(@) + cos 20^(@)+ cos 30^(@)= ............... A) 4 cos 5^(@) cos 10^(@) cos 15^(@) B) 4 cos 10^(@) cos 20^(@) cos 30^(@) C) 4 sin 5^(@) sin 10^(@) sin 15^(@) D) 4 sin 10^(@) sin 20^(@) sin 30^(@)