please answer quick please help
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Ros=∆Rop-∆Pos
Ros=∆Soq-∆Roq
2∆Ros=∆Rop-∆Pos+∆Soq-∆Roq
2∆Ros=90°-∆Pos+∆Soq-9o°
2∆Ros=∆Pos-∆Soq
∆Ros=1/2(∆soq-pos)
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