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

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

Evaluate: sin 25^(@) cos 65^(@) + cos 25^(@) sin 65^(@) .

If cos 25^(@) + sin 25^(@) =p , then: cos 50^(@)=

(sin 65^(@) + sin 25^(@))/( cos 65^(@) + cos 25^(@))=

proof cos65 ^ (@) + cos115 ^ (@) = 0

The value ((cos9^(@)+sin81^(@))(sec9^(@)+cosec81^(@)))/(sin56^(@) sec34^(@)+cos25^(@)cosec65^(@)) is :

Evaluate |(sin 25^(@) cos 25^(@)),(-sin 65^(@) cos 65^(@))| .

The value of ((cos9^@ + sin81^@) (sec9^@+ cosec81^@))/(sin56^@.sec34^@ + cos25^@ cosec65^@) is: ((cos9^@ + sin81^@) (sec9^@+ cosec81^@))/(sin56^@.sec34^@ + cos25^@ cosec65^@) का मान है: