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Class XI Mathematics

Chapter 3: Trigonometric Functions

Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.

Example 1

Degree to Radian conversion

Convert 40 degrees 20 minutes into radian measure.
sin θcos θθ

Calculation Steps:

  1. 1Convert minutes to degrees: 20 minutes = 20/60 = 1/3 degree. So angle = 40.333 degrees.
  2. 2Convert degrees to radians: Radians = 40.333 * (pi / 180).
  3. 3Simplify ratio: 121 / 3 degrees = 121 * pi / 540 radians.
Solution121\pi / 540\text{ rad}