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Free · Class 10 · 5 worksheets · answer keys · practise online · set 25

Trigonometry worksheets — Class 10, with answers

Free Class 10 trigonometry worksheets: trigonometric ratios, find other ratios, standard angle values, simplifying trig identities and heights and distances (applications) — with answers.

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Trigonometric ratios (Class 10)Find the other ratios (Class 10)Standard angles (Class 10)Simplify the identities (Class 10)Heights and distances (Class 10)

Trigonometric ratios

Class 10 · Worksheet 1 · set 25
Name:Date:Score:    / 8

Find the ratio (use Pythagoras for the missing side).

  1. In △ABC, ∠B = 90°, AB = 24 cm, BC = 10 cm. Find cosec A.
  2. In △ABC, ∠B = 90°, AC = 50 cm, BC = 48 cm. Find cos A.
  3. In △ABC, ∠B = 90°, AB = 24 cm, BC = 45 cm. Find cos A.
  4. In △ABC, ∠B = 90°, AC = 58 cm, BC = 42 cm. Find tan A.
  5. In △ABC, ∠B = 90°, AB = 15 cm, BC = 8 cm. Find cot A.
  6. In △ABC, ∠B = 90°, AB = 6 cm, BC = 8 cm. Find tan A.
  7. In △ABC, ∠B = 90°, AB = 24 cm, BC = 10 cm. Find sin A.
  8. In △ABC, ∠B = 90°, AC = 39 cm, BC = 36 cm. Find cosec A.

Find the other ratios

Class 10 · Worksheet 2 · set 25
Name:Date:Score:    / 8

Solve.

  1. If sin A = 15/17, find cos A and tan A.
  2. If tan A = 3/4, find sin A and cos A.
  3. If tan A = 20/21, find sin A and cos A.
  4. If sin A = 7/25, find cos A and tan A.
  5. If sin A = 8/17, find cos A and tan A.
  6. If tan A = 24/7, find sin A and cos A.
  7. If tan A = 7/24, find sin A and cos A.
  8. If tan A = 12/5, find sin A and cos A.

Standard angles

Class 10 · Worksheet 3 · set 25
Name:Date:Score:    / 10

Find the value.

  1. sin² 45° − 2 tan 45° + 3 cos 0° =
  2. sin² 45° + 2 cos² 30° =
  3. sin² 45° + 3 cosec² 60° + cot 45° =
  4. 3 cos 0° + 3 cos² 30° + 3 cosec² 60° =
  5. 2 sin² 45° + cos 60° − 2 cos 0° =
  6. 2 sin 30° + 2 cot 45° =
  7. sec 60° + cos² 45° =
  8. 3 sin 30° + sec² 45° − 2 tan 45° =
  9. 3 sin² 45° + 3 cosec² 60° + 3 sec² 45° =
  10. 2 cos² 60° + 3 sin 90° + 3 sec 60° =

Simplify the identities

Class 10 · Worksheet 4 · set 25
Name:Date:Score:    / 12

Simplify.

  1. sin²θ + cos²θ
  2. cosθ × secθ
  3. cosec²θ − cot²θ
  4. tanθ × cotθ
  5. 1 + tan²θ
  6. (secθ + tanθ)(secθ − tanθ)
  7. 1 + cot²θ
  8. sinθ / cosθ
  9. cos(90° − θ)
  10. (1 − sin²θ) sec²θ
  11. sinθ × cosecθ
  12. tan(90° − θ)

Heights and distances

Class 10 · Worksheet 5 · set 25
Name:Date:Score:    / 6

Solve. Draw a figure first.

  1. From a point 30 m from the foot of a tower, the angle of elevation of its top is 60°. Find the height of the tower.
  2. From a point 33 m from the foot of a tower, the angle of elevation of its top is 60°. Find the height of the tower.
  3. A kite is flying on a string 6 m long. The string makes an angle of 60° with the ground. Find the height of the kite.
  4. A kite is flying on a string 12 m long. The string makes an angle of 30° with the ground. Find the height of the kite.
  5. From a point 24 m from the foot of a tower, the angle of elevation of its top is 45°. Find the height of the tower.
  6. A ladder 10 m long leans against a wall, making an angle of 30° with the ground. How high up the wall does it reach?

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Questions

How do I remember the trigonometric values?

Write 0, 1, 2, 3, 4 under 0°, 30°, 45°, 60°, 90°, divide each by 4 and take the square root — that gives sin. Write the same list backwards for cos.

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