PhysicsMedium202×since 2002Q8377Two vectors P→{\overrightarrow P }P and Q→{\overrightarrow Q }Q have equal magnitudes. If the magnitude of P→+Q→{\overrightarrow P + \overrightarrow Q }P+Q is n times the magnitude of P→−Q→{\overrightarrow P - \overrightarrow Q }P−Q, then angle between P→{\overrightarrow P }P and Q→{\overrightarrow Q }Q is :Asin−1(n−1n+1){\sin ^{ - 1}}\left( {{{n - 1} \over {n + 1}}} \right)sin−1(n+1n−1)Bcos−1(n−1n+1){\cos ^{ - 1}}\left( {{{n - 1} \over {n + 1}}} \right)cos−1(n+1n−1)Csin−1(n2−1n2+1){\sin ^{ - 1}}\left( {{{{n^2} - 1} \over {{n^2} + 1}}} \right)sin−1(n2+1n2−1)Dcos−1(n2−1n2+1){\cos ^{ - 1}}\left( {{{{n^2} - 1} \over {{n^2} + 1}}} \right)cos−1(n2+1n2−1)Check answerSkip