Find the general solution of c o s 2 x − 1 = 0 Options: A . &nbsp x = n π B . &nbsp x = 2 n π + π 2 C . &nbsp x = n π + π 2 D . &nbsp x = 2 n π

Find the general solution of cos2x−1=0

Question

Find the general solution of $c o s^{2} x - 1 = 0$

Options:

A .

x = n π

B .

x = 2 n π + \frac{π}{2}

C .

x = n π + \frac{π}{2}

D .

x = 2 n π

Answer: Option A
:
A

$c o s^{2} x - 1 = 0 1 - c o s^{2} x = 0 s i n^{2} x = 0 s i n x = 0 x = n π$

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