а) f'(x) = -2sinx tgx + 2cos^2(x) sec^2(x)
б) f'(x) = 2( x^2 - 6x + 5 )(2x - 6) = 4x^3 - 24x^2 + 20x - 24x^2 + 144x - 120 = 4x^3 - 48x^2 + 164x - 120
а) f'(x) = -2sinx tgx + 2cos^2(x) sec^2(x)
б) f'(x) = 2( x^2 - 6x + 5 )(2x - 6) = 4x^3 - 24x^2 + 20x - 24x^2 + 144x - 120 = 4x^3 - 48x^2 + 164x - 120