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📐 Mathematics  ·  Trigonometric Functions  ·  JEE

Height of a tower from a point 50m away at elevation 30° is:

Answer: 50/√3 m.

  • A 25m
  • B 50/√3 m
  • C 25√3 m
  • D 50√3 m

Correct answer: B. 50/√3 m

Explanation: tan 30° = h/50. h = 50 × tan 30° = 50/√3 m.

xy0 deg30 deg45 deg (1/sqrt2, 1/sqrt2)60 deg90 degcos45sin45

Unit circle with standard angles 0, 30, 45, 60, 90 degrees; at 45 degrees the point is (cos45, sin45) = (1/sqrt2, 1/sqrt2).

Concept context

Ratios, identities, and applications in triangles

Read the full Trigonometric Functions notes →