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| 1. |
If `cos(theta+phi)=mcos(theta-phi)` then `tantheta` is equal toA. `((1+m)/(1-m)) tan phi`B. `((1-m)/(1+m)) tan phi`C. `((-1m)/(1+m)) cot phi`D. `((1+m)/(1-m)) cot phi` |
| Answer» Correct Answer - A | |