Answer:
C. 13, 26, 39
Step-by-step explanation:
13 is a prime number so the numbers must be 13 and 1. Thus, you are just listing the first multiples of 13.
I believe its c. i hope this helps at all
Answer:
x=pi*n/2+1/2arctan(7/5)
Step-by-step explanation:
5sin(2x)=7cos(2x)
5tan(2x)=7/5
2x=pi*n+arctan(7/5)
x=pi*n/2+1/2arctan(7/5) for n e Z
