Answer:
and 
Step-by-step explanation:
We are given that sin x+cos x=cos 2x
We have to solve the given equation for 

Because 








Tan x is positive in I and III quadrant
In III quadrant angle
replace by 
Therefore, 

Answer:
should be 17
Step-by-step explanation:
Answer:
first option
Step-by-step explanation:
you multiply each coordinate per 4