Trigonometry Practice Questions Easy (original) (raw)

Last Updated : 16 Jun, 2026

Trigonometry can be tricky, especially for class 10 and 11 students when trigonometric ratios and identities are involved.

**Solved Questions (Easy)

**Question 1: Find the sine of an angle A in a right triangle, where the opposite side is 4 units, and the hypotenuse is 5 units.

sin A = Opposite/Hypotenuse = 4 / 5.

**Question 2: Calculate the cosine of an angle B in a right triangle, given that the adjacent side is 3 units and the hypotenuse is 7 units.

cos B = Adjacent/Hypotenuse = 3 / 7.

**Question 3: Find the value of sin(x) when x = 30° (π/6 radians).

sin(30°) = sin(π/6) = 1/2.

**Question 4: Calculate the cosine of an angle θ in a right triangle, where the adjacent side is 5 units, and the hypotenuse is 10 units.

cos θ = Adjacent / Hypotenuse = 5 / 10 = 1/2.

**Question 5: Find the sine of an angle α in a right triangle, where the opposite side is 6 units and the hypotenuse is 10 units.

sin α = Opposite / Hypotenuse = 6 / 10 = 3/5.

**Question 6: Find the value of sin(x) when x = 45 degrees (π/4 radians).

sin(45°) = sin(π/4) = √2/2.

Practice Questions(Easy)

**Question 1: In a right angled triangle, find the sine (sin) of an angle A if the opposite side is 12 units and the hypotenuse is 13 units.

**Question 2: Determine the cosine (cos) of an angle B in a right triangle where the adjacent side is 9 units and the hypotenuse is 15 units.

**Question 3: Calculate the tangent (tan) of an angle C in a right triangle if the opposite side is 8 units and the adjacent side is 6 units.

**Question 4: In a right triangle, the adjacent side is 7 units, and the hypotenuse is 25 units. Find the cosine (cos) of the angle θ.

**Question 5: If sin(θ)=0.8 and θ is in the first quadrant, calculate cos(θ).

**Question 6: In a right triangle, find the sine (sin⁡) of an angle A if the opposite side is 5 units and the hypotenuse is 13 units.

**Question 7: In a right triangle, the adjacent side is 12 units, and the hypotenuse is 13 units. Find the cosine (cos⁡) of the angle B.

**Question 8: In a right triangle, the opposite side is 15 units, and the adjacent side is 20 units. Find the tangent (tan⁡) of the angle C.

**Answer Key:

  1. sin(A) = 12/13.
  2. cos(B) = 9/15 =3/5.
  3. tan(c) = 8/6 = 4/3.
  4. cos( θ) = 7/25.
  5. cos( θ) = 0.6.
  6. sin(A) = 5/13.
  7. cos(B) = 12/13.​
  8. tan⁡(C) = 3/4​.

**Practice More