2014 · Q57
If α and β are complementary angles, then what is √(cos α cosec β - cos α sin β) equal to?
Elementary MathematicsTrigonometry
- Asec β
- Bcos α
- Csin α
- D-tan β
Explanation
cosec β = sec α and sin β = cos α; the expression becomes √(1 - cos^2α) = sin α.