The value of the expression: sin21° + sin211° + sin221° + sin231° + sin241°

Question

The value of the expression:
sin21° + sin211° + sin221° + sin231° + sin241° + sin245° + sin249° + sin259° + sin269° + sin279° + sin289° is?

Options:

A . 0

B . $${\text{5}}\frac{1}{2}$$

C . $${\text{4}}\frac{1}{2}$$

D . 5

Answer: Option B

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