I'm currently studying for my A2's but I'm retaking C2, and I was doing some past papers and got a question to find the equation of a tangent to a circle. I used implicit differentiation to achieve dy/dx and find the gradient and hence finding the equation of the tangent. The answer was correct, but, am I allowed to use implicit differentiation in C2 to find the eq. of the tangent? Will I lose marks?
Thanks for the help