Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesMix Examples-Trigonometrical Ratios, Functions and Identities
EasyIf $\sec \theta = m$ and $\tan \theta = n$,then $\frac{1}{m} \left[ m + n + \frac{1}{m + n} \right] = $
- A$1$
- B$2$
- C$-1$
- D$3$
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