Answer:
A
Step-by-step explanation:
3x3=9
2 3's therefore 3^2=9
3×3×3=27
3 3's therefore 3^3=27

Find cos using trig identities:

Therefore

Sub in tan x = 3, (Note that x is in 3rd quadrant, cos x < 0)

Finally, sub into Half-angle formula:(Note x/2 is in 2nd quadrant, tan x<0)
You can compare it because both is going to be 9.4 because you always have to round it if the second number from the decimal is a 5 or higher the first number past the decimal would go up one. but if it is 4 or lower it stays the same.
Answer:
the value is 14
Step-by-step explanation:
because im just trying to get points