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:
The range is 31
Step-by-step explanation:
Range is highest number - lowest number.
The highest number is 54 and the lowest is 23.
54-23=31
If the x stands for multiplying then it will equal 7. take 7 divided by 8 and then multiply that by 8 and you get seven. did that help my dear?
7 is a prime number, which means it can't be simplified. This fraction is already in simplest form, also because 25 and 7 don't have any common factors.
You mean the word or number