Saved Bookmarks
| 1. |
2८0556-15170 0050(00६6 — tanb = |
|
Answer» cotƟ – tanƟ =2cos2Ɵ – 1/sinƟcosƟ LHS=cosƟ/sinƟ – sinƟ/cosƟ =cos2Ɵ – sin2Ɵ/sinƟcosƟ =cos2Ɵ – (1 – cos2Ɵ)/sinƟcosƟ =cos2Ɵ – 1 + cosƟ/sinƟcosƟ =2cos2Ɵ – 1/sinƟcosƟ |
|