" 6."4(sin24^(@)+cos6^(@))=sqrt(3)+sqrt(15)

4(sin24^(0)+cos6^(@))=sqrt(3)+sqrt(15)

prove that 4sin(24^(@)+cos6^(@))=sqrt(3)+sqrt(15)

4(sin2 4^0+cos6^0)=sqrt(3)+sqrt(15)

4(sin2 4^0+cos6^0)=sqrt(3)+sqrt(15)

sqrt(x+3)+sqrt(x+15)<6

Prove that 4(cos66^(@)+sin84^(@)) = sqrt(3) + sqrt(15) .

cos6^(@)sin24^(@)cos72^(@)=

cos6^(@)*sin24^(@)*cos72^(@)=

(sin75^(@) - sin 15^(@))/(cos 75^(@) + cos 15^(@)) A) -sqrt3 B) sqrt3 C) (1)/(sqrt3) D) (1)/(sqrt3)

Prove that (i) " sin " 75^(@) =((sqrt(6)+sqrt(2)))/(4) (ii) (cos 135^(@) -cos 120^(@))/(cos 135^(@) +cos 120^(@)) =(3 -2sqrt(2)) (iii) " tan " 15^(@) +" cot " 15^(@) =4