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:
36/100 of a mile
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:

where

. The second term of the expansion occurs when

.
So the second term of the expansion of

is
Step-by-step explanation:
b is the correct answer.