Trigonometric Identities Quiz (5 Questions)

1. Verify sin²x + cos²x for x = 30°

2. True or False: tan x = sin x / cos x

3. If tan θ = 1, find θ in degrees (0° < θ < 90°)

4. Find sec x if cos x = 2/3

5. True or False: 1 + cot²x = csc²x

Answer Key

1. sin²30° + cos²30° = (1/2)² + (√3/2)² = 1/4 + 3/4 = 1 ✅

2. True

3. θ = 45°

4. sec x = 1 / (2/3) = 3/2

5. True