Trigonometryeasy · Past Paper
What is sin² 45° + cos² 45°?
A1/2
B1
C1/√2
D2
✓ Correct Answer: B — 1
According to the identity sin² θ + cos² θ = 1, the value is always 1 regardless of the angle.
Share this question
More from Trigonometry
- Evaluate: cos 10° cos 20° - sin 10° sin 20°.
- Simplify: sin(2A) / (2 sin A)
- The angle of depression of a car from a 10 m high building is 45°. How far is the car from the building?
- The angles of elevation of the top of a tower from two points on the ground at distances 4 m and 9 m from the base are complementary. Tower height?
- Simplify the expression: (1 - cos 2A) / sin 2A.