Trigonometric values of different ratios are very important for the study of relationships between lengths and angles of triangles. The trigonometric values of
Trigonometry formulas:
Trigonometric ratios of some specific angles
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Value of all trigonometric ratios at
Let . Then
Therefore
.
Since
, Solving this we get
Since we get that
Now
=
Now
Similarly we can find ,
and
.
Now
By using these , we get
etc.