A polar coordinate is that which can be written as (r, θ) where r is the radius and θ is the angle.
The radius, r, is also the hypotenuse of the right triangle that can be formed. Hence, it can be calculated through the equation,
r² = x² + y²
If we are to simplify this for the r alone, we have,
r = sqrt (x² + y²)
Substituting the known values,
r = sqrt ((4)² + (-4)²) = 4√2
The x and y can be related through the trigonometric function, tangent.
tan θ = y/x
To solve for θ
θ = tan⁻¹(y/x) = tan⁻¹(-4/4) = -45° = 315°
Hence, the polar coordinate is <em>(4√2, 315°)</em>
The answer for that is the second one
71 isn't a perfect square but the square root of 64 is close to it so basically you can say about 8
Answer:
$18.00
Step-by-step explanation:
Because you know that 15 baseball cards costs 9.00. 30 is 2 15s added together. So you will do 9.00+9.00 in order to get the amount of money it needs. Double the baseball cards cost double the money.
Hope this helps. Please give brainliest.
Answer:
the remaining money is $1189.22
Step-by-step explanation: