Question

Solve cos x + sq. root of 2 = - cos x for x over the interval {0,2pi].

A) x = 3pi/4
B) x = 3pi/4 + 2npi
C) x = 3pi/4 and 5pi/4
D) x = pi/4 and 7pi/4

Answer 1

C. X = 3pi/4 and 5pi/4

Explanation:

this is the correct answer for this question

Answer 2

see attached picture for the answer:

I have fixed the answer