Q. u=(8,6)Find the direction angle of u. Enter your answer as an angle in degrees between 0∘ and 360∘ rounded to the nearest hundredth.θ=□∘
Calculate Tangent Ratio: To find the direction angle of the vectoru=(8,6), we need to calculate the angle θ that the vector makes with the positive x-axis. The direction angle can be found using the arctangent function, which is the inverse of the tangent function. The tangent of the angle is the ratio of the y-coordinate to the x-coordinate of the vector. So, we calculate tan(θ)=xy.
Substitute Values: Substitute the values of the vector u=(8,6) into the formula to get tan(θ)=86=43.
Use Arctangent Function: Now, we use the arctangent function to find the angle θ. We calculate θ=arctan(43). This will give us the angle in radians, which we then convert to degrees.
Convert to Degrees: Using a calculator, we find that θ≈arctan(43) in degrees is approximately 36.87 degrees.
Check Quadrant: Since the vector u=(8,6) is in the first quadrant (both x and y are positive), the direction angle θ is already between 0 and 90 degrees. Therefore, we do not need to adjust the angle further.
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