Solve each of the following equations for value x in the range 0 < x< 360. (a) 8 sin^2 x + 2 cos x - 5 = 0 (b) 4 sec^2 x - 3 tan^2 x = 5 tan x I just need the first 3 steps to solve the question. Thanks.
Follow Math Help Forum on Facebook and Google+
For the first: $\displaystyle \sin^2{x} = 1 - \cos^2{x}$. Substitute, simplify and solve the quadratic. For the second: $\displaystyle \sec^2{x} = \tan^2{x} + 1$. Substitute, simplify and solve the quadratic.
View Tag Cloud