Q147. If the line y cos(α) = x sin(α) + a cos(α) is a tangent to the circle x2 + y2 = a2, then which of the following conditions must be true?Mathematics — Conic Sections — Question 147 of 272A. sin(α) = 1B. sin2(α) = a2C. cos2(α) = 1D. cos2(α) = a2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →