Trigonometryeasy · Past Paper
Evaluate: sin^2 30 + cos^2 30
A1/2
B1/4
C1
D3/4
✓ Correct Answer: C — 1
Using identity sin^2 A + cos^2 A = 1 for any angle A.
Share this question
More from Trigonometry
- From a point on the ground, the angle of elevation of a jet plane is 60°. After a flight of 15 seconds, it becomes 30°. If plane flies at 1500√3 m, find speed.
- What is the value of cos 30°?
- The value of (sin 30 + cos 30) - (sin 60 + cos 60) is:
- In a triangle right-angled at B, AB = 24 cm, BC = 7 cm. Find sin A.
- If sin θ = 12/13, find the value of (sec θ + tan θ).