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Answer:
The speed from the observer is 8 mph.
Step-by-step explanation:
When the boat is going downstream with full force, its speed will be the one the oarsman can row on still water added by the flow of the river. In this case he can row the boat at speed of 3 mph, while the stream is 5 mph, so the speed from the observer standpoint is:
The speed from the observer is 8 mph.
Answer:
12
Step-by-step explanation:
using pythagoras theorem
here 15 is hypotenuse since it is opposite 0f 90 degree
9 and x are the other smaller sides of a triangle
according to pythagoras thorem the sum of square of two smaller sides of a triangle is equal to the square of hypotenuse. So,
9^2 + x^2 = 15^2
81 + x^2 = 225
x^2 = 225 - 81
x^2 = 144
x =
x = 12
We are to find the value of 
First we evaluate tan(π/4). The value of tan(π/4) is 1.
So,
sin(π/2) = 1
So,
Thus, we can write:
radians.
So, the answer to this question is π/2 radians.
First we evaluate tan(π/4). The value of tan(π/4) is 1.
So,
sin(π/2) = 1
So,
Thus, we can write:
So, the answer to this question is π/2 radians.