InterviewSolution
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InterviewSolution
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Value of the expression \(\frac{{3{\rm{sin}}72^\circ }}{{{\rm{cos}}18^\circ }} - \frac{{{\rm{sec}}32^\circ }}{{{\rm{cosec}}58}}\) is1). -22). 13). 24). 3 |
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Answer» $(\FRAC{{3{\rm{sin}}72^\circ }}{{{\rm{COS}}18^\circ }} - \frac{{{\rm{sec}}32^\circ }}{{{\rm{cosec}}58}})$ $( \Rightarrow \frac{{3{\rm{sin}}\left( {90^\circ {\rm{\;}} - {\rm{\;}}18^\circ } \right)}}{{{\rm{cos}}18^\circ }} - \frac{{{\rm{sec}}\left( {90^\circ {\rm{\;}} - {\rm{\;}}58^\circ } \right)}}{{{\rm{cosec}}58^\circ }} = \frac{{3\cos 18^\circ }}{{{\rm{cos}}18^\circ }} - \frac{{{\rm{cosec}}58^\circ }}{{{\rm{cosec}}58^\circ }})$ ⇒ 3 × 1 - 1 = 2 |
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