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[" (C) "1/8],[" 24."(cos12^(@)-sin12^(@)...

[" (C) "1/8],[" 24."(cos12^(@)-sin12^(@))/(cos12^(@)+sin12^(@))+(sin147^(@))/(cos147^(@))=],[[" (A) "1," (B) "-1],[" (C) "0," (D) None of these "]]

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(cos 12^(@) - sin 12^(@))/(cos 12^(@) + sin 12) + (sin 147^(@))/(cos 147^(@))=

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