I had a question about Example 7 on Page 270 in the PWN Math Guide book fourth edition. I don’t understand how sin (15) is equal to cos (5pi/12). Could you explain this ?

Not sure where you’re getting from. Can you clarify in the comments?

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I had a question about Example 7 on Page 270 in the PWN Math Guide book fourth edition. I don’t understand how sin (15) is equal to cos (5pi/12). Could you explain this ?

Not sure where you’re getting from. Can you clarify in the comments?