Hello there!
0.8 is not irrational
If a number can be written with a perfect fraction, it is rational
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Answer:
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Step-by-step explanation:
The answer to this would be 4^3 or 4×4×4.
This equals 64. So there are 64 chairs in thé building.
Sin (a+b) = sin a. cos b + cos a. sin b
a= 50° and b=40°, then
sin(50+40) = sin 50° . cos 40° + cos 50° . sin 40°
sin(50+40) = sin 90° = 1 and
sin 50° . cos 40° + cos 50° . sin 40° = 1
