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Question

Convert 1.5 radians to degrees.

This question was previously asked in
SSC CGL 2025 Tier 2 Paper 1 Question Paper (19-Jan-2026)
The correct answer is
$85.94^\circ$

Converting Radians to Degrees

To convert an angle from radians to degrees, use the conversion factor $\frac{180^\circ}{\pi}$. The formula is:

Degrees = Radians $\times \frac{180^\circ}{\pi}$

Calculation Steps

  1. Identify the angle in radians: The given angle is 1.5 radians.

  2. Apply the conversion formula: Substitute 1.5 into the formula.

    Degrees = $1.5 \times \frac{180^\circ}{\pi}$

  3. Perform the multiplication:

    Degrees = $\frac{1.5 \times 180^\circ}{\pi} = \frac{270^\circ}{\pi}$

  4. Calculate the final value:

    Using the approximate value of $\pi \approx 3.14159$, we get:

    Degrees $\approx \frac{270^\circ}{3.14159} \approx 85.943669^\circ$

  5. Round the result:

    Rounding to two decimal places, the angle is approximately $85.94^\circ$.

Therefore, 1.5 radians is approximately $85.94^\circ$.

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  4. What is \(\dfrac{5\pi}{4}\) radians in degrees?

  5. A sector has a central angle of 135° and a radius of 8 cm. Another sector of the same circle has a central angle of \(\dfrac{3\pi}{4}\) radians. What is the ratio of the area of the first sector to the area of the second sector?

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Important Questions from Angles and measures in degrees and radians

  1. If P = sin20 θ + cos48 θ, then the inequality that holds for all values of θ is

  2. Express \({\pi\over 12}\)  radians in degrees.

  3. 30 degree is equal to _________ radians.

  4. The radian equivalent of 150° is _______.
  5. The central angles p, q, r and s (in degrees) of four sectors in a Pie Chart satisfy the relation 9p = 3q = 2r = 6s. What is the value of 4p - q ?

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