Step-by-step explanation:
I think, he made a mistake because the exponents have different values but then if you'll look at his results, he just wrote the same thing. If you want, you could post the original problem, and I'll solve it for you :)
Fran swims at a speed of 2.6 mph in still water. The Lazy River flows at a speed of 0.4 mph. How long will it take Fran to swim
1 answer:
Answer:
Upstream = 0.5 hour.
Downstream = 0.366 hour.
Step-by-step explanation:
Speed of fram in still water (u) = 2.6 mph.
Speed of water (v) = 0.4 mph .
<h3>Time taken by fran to swim 1.1 mi upstream.</h3>Speed upstream = u - v = (2.6 - 0.4) mph = 2.2 mph
So the time taken = = 0.5 hour.
Speed downstream = u + v = (2.6 + 0.4) mph = 3 mph .
So the time taken = = 0.366 hour .
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Answer:
Ф =
Step-by-step explanation:
It is a bit difficult to input the work here, so I uploaded an image
- First we can use the trig identities to change sec²(Ф) to tan²(Ф) + 1
- Then we can combine like terms
- Then we can factor this as a polynomial function
- Then we can set each term equal to zero and solve for Ф
- The first term tan(Ф) - 2 = 0 has no solution because tan(Ф) ≠ -2 anywhere
- The second term tan(Ф) - 1 = 0 has two solutions of
and
so these are the solutions to the problem
