Discover Questions

How much energy does a photon of red light that has a wavelength of 6.40 x 10^7 m contain? Trigonometry help cosine rule? Regarding the rules of probability, which of the following statements is correct? I need help proving this identity please! sin^4x + 2cos^2x - cos^4x = 1? Solve the following equations: a) 6sinX - 3 = 1 - 2sinX b) 2sinXcosX = 0?