angle sum and difference images

asebian · Jun 18, 2024 · 231c61e · 231c61e
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diff --git a/README.md b/README.md
@@ -49,15 +49,21 @@ Angle sum identities:
 
 [https://www.desmos.com/calculator/qs0vt2ojbh](https://www.desmos.com/calculator/qs0vt2ojbh)
 
+![screenshot angle sum identities](img/trigSum.png)
+
 Angle difference identities:
 
 [https://www.desmos.com/calculator/plyunzieof](https://www.desmos.com/calculator/plyunzieof)
 
+![screenshot angle difference identities](img/trigDiff.png)
+
 ### Hyperbolic functions
 Hyperbolic sine, cosine, tangent and the unit hyperbola.
 
 [https://www.desmos.com/calculator/a6emttcq15](https://www.desmos.com/calculator/a6emttcq15)
 
+![screenshot hyperbolic functions](img/hyptrig.png)
+
 ### ln, e, exp, W
 Natural logarithm, Euler number, exponential function and LambertW-function of real values.