How do you solve #2cosx=secx#?
1 Answer
Aug 24, 2016
x = 45° + k.180° or x = 135° + k.180°. k
Explanation:
x cannot equal 90° + k.180°, k
multiply throughout by cos x
then 2
hence cos x = ±
Reference angle is 45°
cos x =
and cos x = 1
add multiples of 360° to each answer and combine to get final answer.
