Trigonometryhard · Past Paper
Simplify: (sin 5A - sin 3A) / (cos 5A + cos 3A).
Atan A
Btan 2A
Ccot A
Dcot 4A
✓ Correct Answer: A — tan A
Using CD formulas: (2 cos 4A sin A) / (2 cos 4A cos A) = sin A / cos A = tan A.
Share this question
More from Trigonometry
- Simplify (1 + cot^2 A) sin^2 A.
- Simplify: (sin^4 A - cos^4 A + 1) cosec^2 A
- Find the distance of a point from the foot of a 100 m high tower if the angle of elevation is 45°.
- If A+B+C = 180, then sin^2 A + sin^2 B - sin^2 C = ?
- The angle of elevation of the top of a tower from a point is α. On moving distance 'a' towards it, it is 45 and 'b' more, it is 90-α. Height?