`sin 75^(@) + sin 15^(@) = `

Show that sin^(2) 75^(@) - sin^(2) 15^(@) = (sqrt(3))/(2)

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

Evaluate : (cos 75^(@))/ (sin 15^(@)) + (sin 12^(@))/ (cos 78^(@)) - (cos 18^(@))/ (sin 72^(@))

Which one of the following number (s) is/are rational? - 1) sin 15^(@) 2) cos 15^(@) 3) sin 15^(@) cos 15^(@) 4) sin15^(@) cos 75^(@)

Express each of the folloiwng as a product (i) sin 75^(@)-sin 35^(@) (ii) cos 65^(@)+cos 15^(@) (iii) sin 50^(@)+sin 40^(@) (iv) cos 35^(@)-cos 75^(@) .

sin^(2) 75^(@) - sin^(2)15^(@)=

Write the value of 2sin 75^(@) sin15^(@)

(cos 75^(@)+cos15^(@))/(sin75^(@)-sin 15^(@))=sqrt(3)

(cos 75^(@)+cos15^(@))/(sin75^(@)-sin 15^(@))=sqrt(3)

sin 10^(@)+sin 20^(@) + sin 40 ^(@) + sin 50 = A) sin 15^(@) +sin 75^(@) B) cos 15^(@) + cos75^(@) C) sin 70^(@) + sin 80^(@) D) cos 70^(@) + cos 80^(@)