Answer:
Solution are
i) 
Step-by-step explanation:
1) (sinx)(cosx) =0
sin2x/2 =0
2x =0, 2pi, 3pi, 4pi
Hence 
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2) 
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Answer:
Exact Form:
20/10
Decimal Form:
2.9
Mixed Number Form:
2 9/10
Step-by-step explanation:
All squares are rectangles
all squares are rhombuses