" (vi) "sin105^(@)+cos105^(@)=(1)/(sqrt(2))

Prove that : (i) "sin"105^(@)+cos105^(@)=(1)/(sqrt(2)) (ii) cos105^(@)+cos15^(@)="sin"75^(@)-"sin"15^(@)

sin15^(@)+cos105^(@)=?

105^(2)

Show that sin 105^(@) + cos 105^(@) =(1)/(sqrt(2))

cos15^(@)+cos105^(@)=

Show that sin 150^(@) + cos 105^(@) =(1)/(sqrt(5))

sin 15^(@) + cos 105 ^(@) =

sin15^@+cos105^@=

Prove that (i) "cos " 15^(@) - " sin " 15^(@) = (1)/(sqrt(2)) (ii) " cot " 105^(@) - " tan " 105^(@) =2sqrt(3) (iii) (tan 69^(@) + tan 66^(@))/(1-tan 69^(@) tan 66^(@)) =-1