Answer:
The perfect squares it lies between are 64 and 81
The answer is 6√2
And it lies between the numbers 8 and 9
Hope this helps.
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C I'm using the calculator and the other ones don't make sense
Given :
An equation, 2cos ß sin ß = cos ß .
To Find :
The value for above equation in (0, 2π ] .
Solution :
Now, 2cos ß sin ß = cos ß
2 sin ß = 1
sin ß = 1/2
We know, sin ß = sin (π/6) or sin ß = sin (5π/6) in ( 0, 2π ] .
Therefore,

Hence, this is the required solution.
Not sure what simp lies firm is