(7) 2 sin11°15' is equal to-(A)√2-√2+√2 (B) √2 -√2-√2 (C) √2+√2+√2/2 (D) √2+√2-√2/2 (8) if 60°+a & 60°-a are roots of sin^2 x+bsinx + c =0 , then-(A)4b^2 + 3=12c(B)4b + 3 =12c(C)4b^2 - 3=-12c(D)4b^2 - 3=12c

Lisha , 6 Years ago

Grade 12th pass