Derivative of 1 x 2 by first principle July 8, 2019 16 32 64 128 Find the derivative of 1 x 2 by first principle Derivative of 1 x 2 using first principles Derivative of cos x 2 1 by first principle Derivative of sin x 2 1 by first principle Find the derivative of cos − 1 x 2 with respect to x by first principle