2012 · Q55
What is sin A cos A tan A + cos A sin A cot A equal to?
Elementary MathematicsTrigonometry
- Asin^2 A + cos A
- Bsin^2 A + tan^2 A
- Csin^2 A + cot^2 A
- Dcosec^2 A - cot^2 A
Explanation
The expression simplifies to sin^2 A + cos^2 A = 1 = cosec^2 A - cot^2 A.