Trigonometry/The sine of 15 degrees
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We have
If then
so after some manipulation (left as an exercise),
These results may be combined with those from the previous section to find the sines and cosines of and its multiples.
We have
If then
so after some manipulation (left as an exercise),
These results may be combined with those from the previous section to find the sines and cosines of and its multiples.