((498+375)^(2)-(498-375)^(2))/(498times375)=?

((489+375)^2- (489-375)^2=?)/((489xx375)) 144 (b) 864 (c) 2 (d) 4 (e) None of these

Evaluate: (502)^(2)-(498)^(2)

The expression sqrt(sin^(4)(37.5)^(@)+4cos^(2)(37.5)^(@)) +sqrt(cos^(4)(37.5)^(@)+4sin^(2)(37.5)^(@)) simplifies to

The expression sqrt(sin^(4)(37.5)^(@)+4cos^(2)(37.5)^(@)) +sqrt(cos^(4)(37.5)^(@)+4sin^(2)(37.5)^(@)) simplifies to

The expression sqrt(sin^(4)(37.5)^(@)+4cos^(2)(37.5)^(@))+sqrt(cos^(4)(37.5)^(@)+4sin^(2)(37.5)^(@)) simplifies to

The expression sqrt(sin^(4)(37.5)^(@)+4cos^(2)(37.5)^(@)) +sqrt(cos^(4)(37.5)^(@)+4sin^(2)(37.5)^(@)) simplifies to

The value of ((2. 697-0. 498)^2+(2. 697+0. 498)^2)/(2. 697xx2. 697+0. 498xx0. 498) is (a) 0.5 (b) 2 (c) 2.199 (d) 3.195

cos^(2)(97.5^(@))-sin^(2)(37.5^(@)) is equal to-