High school math exam, explain why you chose C, thank you.

Solution: Observing the image, we know that: f (pai/8) = sin (pai/4) = g (17pai/24) = root number 2/2.

Substitute x= 17pai/24 into the analytical formula of g(x), a.g (17pai/24) = sin (13pai/12) =-sin (pai//kloc-0

B.g( 17 pai/24)= sin(25 pai/ 12)= sin(pai/ 12)X

D.g (17pai/24) = cos (5pai/4) =-cos (pai/4) =-radical 2/2.x.

So choose C. This solution is: the "special case assignment method" in the special law. Special methods to solve multiple-choice questions are characterized by simplicity, rapidity and accuracy.

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