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Zara♥️
Answers (1)
R²=a²+b²-2ab cos theta But R? a=10N b=20N Theta=(180-60)=120° R²=10²+20²-2×10×20 cos 120° =100+400-400(0.5) =500+400×0.5 =500+200 =700 R²=√700 =26.5N,,
