` cos 175^(@) + cos 65^(@) + cos 55^(@)` का मान है -

cos 25^(@) - cos65^(@) =

cos175^(@)+cos65^(@)+cos55^(@)=?

find cos175^(@)+cos65^(@)+cos55^(@)

x = cos 55^(@), y = cos 65^(@), z= cos 175^(@) " then " xy+yz+ zx=

What is the value of cos 15^@-cos 165^@ ? cos 15^@-cos 165^@ का मान क्या है?

The value cosec(67^@ +theta)-sec (23^@ -theta)+cos 15^@ cos35^@ cosec 55^@ cos60^@ cosec 75^@ is: cosec(67^@ +theta)-sec (23^@ -theta)+cos 15^@ cos35^@ cosec 55^@ cos60^@ cosec 75^@ का मान है :

Prove that: cos175^(@)+cos65^(@)+cos55^(@)=0

cos 55^(@) + cos 65^(@) + cos 175^(@)= A)0B)1C) sin 18^(@) D) cos 36 ^(@)