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If θ/π = 1.65 and 0 < θ < 2π, in which quadrant will θ lie?

Answer and explanation

Correct answer: Fourth quadrant

The governing concept is locating a radian angle by comparing it with the quadrant boundaries. From θ/π = 1.65, multiply by π to obtain θ = 1.65π. The four quadrants are bounded by 0, π/2, π, 3π/2, and 2π. Since 3π/2 = 1.5π and 1.5π < 1.65π < 2π, the angle lies between 3π/2 and 2π. This interval is the fourth quadrant, so option A is correct. It is not in the third quadrant because that quadrant extends only from π to 3π/2. The given condition 0 < θ < 2π confirms that the angle makes one complete revolution range without reaching either endpoint.

Related tags

AnglesQuadrantsRadian-MeasureTrigonometrySigns Of Trigonometric Functions In Different QuadrantsTrigonometric FunctionsMathematicsClass 12 Mcq

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