\( \triangle A B C \) में, \( \angle B=90^{\circ}, \angle A=30^{\circ}, b=20 \) सेमी, तो \( a \)...
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\( \triangle A B C \) में, \( \angle B=90^{\circ}, \angle A=30^{\circ}, b=20 \) सेमी, तो \( a \) और \( c \) का मान ज्ञात कीजिए।
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