Trigonometrymedium · Past Paper
Evaluate: sin 60° cos 30° + cos 60° sin 30°
A0
B1
C1/2
D√3/2
✓ Correct Answer: B — 1
This follows the formula sin(A+B). sin(60+30) = sin 90° = 1.
Share this question
More from Trigonometry
- Simplify (sin 5A - sin 3A) / (cos 5A + cos 3A).
- A vertical tower is surmounted by a flagstaff of height h. At a point on ground, elevations of bottom and top of flagstaff are α and β. Tower height is:
- In a triangle, if sin^2 A + sin^2 B + sin^2 C = 2, the triangle is:
- In a right triangle, if the perpendicular is 3 units and the base is 4 units, what is the hypotenuse?
- If sin x + cosec x = 2, then sin^2 x + cosec^2 x = ?