If f(x) = 2x(sin x + cos x), find f'(x) = 2 (sin(x) + cos(x) + x(cos(x) - sin(x))) 2(sin(x) + cos(x)) + 2x(cos(x) - sin(x)) f'(1) = 3.9993 If f(x) = = f'(x) = 5 sin x + 2 cos x, then 5 cos(x) - 2 sin(x) f'(1) = 4.964 X 8 OB 4x tanz If f(x) = secr f'(x) = 4(2x tan (2) cos(x) + cos(z) (2)) 4(2x sin(x) + x cos(x)) Find f'(1)= 4.139 , find If f(x)= 5 sin x 3 + cos x 15 cos(x) + 5 (3 + cos(x)) F 5(1+3 cos(x)) (3+ cos(x)) f'(4) = 1.249 then X If f(x)= - 6 tan x, then f'(x)=sin(x) - 6 sec(x) = cos x f'(4) = - -6.0990 X 8