If \cos ( {\A}- {\B})= {\sqrt{3}}/{2} and \sec {\A}=2,0^{\circ} \leq {\A} \leq 90^{\circ}, 0^{\circ} \leq {\B} \leq 90^{\circ}, then what is the measure of {\B} ?

SSC CGL 11 Apr 2022 Shift 2 Paper

Question : 66 of 75

Marks: +1, -0

\cos ( {\A}- {\B})=\;{{√{3}}}/{2}

and

\ sec {\A}=2,0^{∘} ≤ {\A} ≤ 90^{∘}, 0^{∘} ≤ {\B} ≤ 90^{∘}

, then what is the measure of

{\B}

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