2009 · Q17
If cos x/cos y =n, sin x /sin y =m, then what is(m 2 -n 2 ) sin 2 y equal to?
Elementary MathematicsTrigonometry
- A1- n 2
- B1+n 2
- Cm 2
- Dn 2
Explanation
Solved; answer A.
If cos x/cos y =n, sin x /sin y =m, then what is(m 2 -n 2 ) sin 2 y equal to?
Explanation
Solved; answer A.