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**sin**(**30** deg)+**sin**(40 deg)=1.14278761 And even if your functions are hyperbolic functions the first expression cannot give 0 otherwise **30** would be equal to 40, and no reasonable person would expect that.

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**30** [**sin**] to calculate the **sin**e function of **30** degrees, with the 115ES its [**sin**] **30** [=]. The 115ES has all the standard trigonometric functions: Standard functions (**sin**, cos, tan), type the [**sin**], [cos

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