Answer:
see explanation
Step-by-step explanation:
To find cscθ we require to find the third side of the triangle.
let 3rd side be x and using Pythagoras' identity
x² + 8² = 9²
x² + 64 = 81 ( subtract 64 from both sides )
x² = 17 ( take square root of both sides )
x =
Then
cosθ = =
cscθ = =
tanθ = =
Answer:
It will take 4.5hrs to cover the same distance
The constant of variation,k=252
Step by step explanation
Given that,
From the question
Time=4hr
Speed=63km
By substitution we obtain,
Cross multiplying we get,
Now,
speed=56km
Distance Covered=252km
By substitution:
We obtain,
Cross multiply
Divide through by 56
From the formula,
Which means that, speed and time varies inversely.
Let k be variation constant
This implies that
Taken,
Time=4hrs
speed=56km