The expression sqrt(sin^(4)(37.5)^(@)+4c...

The expression `sqrt(sin^(4)(37.5)^(@)+4cos^(2)(37.5)^(@)) +sqrt(cos^(4)(37.5)^(@)+4sin^(2)(37.5)^(@))` simplifies to

A

an irrational number

B

a prime number

C

a natural number which is not composite

D

a real number of the form `a + sqrt(b)` where a and b are prime

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