Recall your d = rt, distance = rate * time.
let's say the rate of speed for Kala was "r" on the way over to the mountains.
Now, on the way over, it took 8 hours due to heavy traffic, whilst on the way back it took only 5 hours since there was no traffic.
The distance covered, say "d" miles, is the same on the way over as well as on the way back.
Answer:
x = π/4 and 5π/4
Step-by-step explanation:
sin(π/4) = √2/2
cos(π/4) = √2/2
sin(5π/4) = -√2/2
cos(5π/4) = -√2/2
It is wise to remember your unit circle. We know that cosx and sinx have values of ±√2/2 at every π/4 on the unit circle.
The opposite reciprocal of -1/9 is 9
So the answer is A