Trigonometrymedium · Past Paper
Evaluate: 2 sin 45° cos 45°
A1/2
B1
C√2
D2
✓ Correct Answer: B — 1
2 * (1/√2) * (1/√2) = 2 * (1/2) = 1.
Share this question
More from Trigonometry
- A balloon is connected to ground by a 100 m string. If it makes 60° with ground, height is:
- A person standing on the bank of a river observes the angle of elevation of a tree on the opposite bank as 60°. When he moves 40 m away, it becomes 30°. Width of river?
- The value of cos(0) is:
- If a cos θ - b sin θ = c, then a sin θ + b cos θ is:
- A round balloon of radius r subtends an angle θ at the eye of an observer, while the angle of elevation of its center is φ. Height of center?