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Sasa

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4 Cos^2 x-1=0
1. 1 answer
2. 309 views
''Thank you so much for you're patiently waiting.''1. Is the statement grammatically correct? 2. What is its sentence patterns?
1. 2 answers
2. 657 views
A stone is dropped from the roof of a building: 2.5s after, a second stone is thrown straight down with an initial speed of
1. 0 answers
2. 621 views