Aneesha travels at a rate of 50 miles per hour. Morris is traveling 3 feet per second less than Aneesha. Which is the best estim
2 answers:
Answer:
70.33 feet per second ( approx )
Step-by-step explanation:
Given,
The speed of Anneesha = 50 miles per hour,
1 mile = 5280 feet,
Also, 1 hour = 3600 seconds,
Thus, the speed of Annesha = feet per sec
Now, Morris is traveling 3 feet per second less than Aneesha.
Therefore, the speed of Morris = 73.33 - 3 = 70.33 feet per second.
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Answer:
Step-by-step explanation:
Begin by squaring both sides to get rid of the radical. Doing that gives you:
Now use the Pythagorean identity that says
and make the replacement:
. Now move everything over to one side of the equals sign and set it equal to 0 so you can factor:
and then simplify to
Factor out the common cos(x) to get
and there you have your 2 trig equations:
cos(x) = 0 and 1 - cos(x) = 0
The first one is easy enough to solve. Look on the unit circle and see where, one time around, where the cos of an angle is equal to 0. That occurs at
The second equation simplifies to
cos(x) = 1
Again, look to the unit circle and find where the cos of an angle is equal to 1. That occurs at π only.
So, in the end, your 3 solutions are