MCQOPTIONS
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MCQOPTIONS
| 1. |
If tan A=n tan B and Sin A= m Sin B, then the value of Cos2A is |
| A. | $$ {m^{2}+1 over {n^{2}+1}}$$ |
| B. | $$ {m^{2}+1 over {n^{2}-1}}$$ |
| C. | $$ {m^{2}-1 over {n^{2}-1}}$$ |
| D. | $$ {m^{2}-1 over {n^{2}+1}}$$ |
| Answer» D. $$ {m^{2}-1 over {n^{2}+1}}$$ | |