are trigonometric function broken ?

hello, every trigonometric functions seems to trigger a precision limit exceeded error from decimal.js

in console of https://mathjs.org/, execute this

```
var math_cfg = {
number: "BigNumber",
precision: 509,
relTol: 1e-320,
absTol: 1e-323
}
math.config(math_cfg);

math.evaluate('tan(pi/2)')
```

decimal.mjs:3164 Uncaught Error: [DecimalError] Precision limit exceeded
at Ct (decimal.mjs:3164:32)
at Ut (decimal.mjs:3762:10)
at yt.sine.yt.sin (decimal.mjs:1700:18)
at yt.tangent.yt.tan (decimal.mjs:1836:9)
at Complex | BigNumber (tan.js:36:35)
at tan (typed-function.js:1465:22)
at FunctionNode.js:203:24
at Object.evaluate (Node.js:54:16)
at Object.string (evaluate.js:49:36)
at Object.evaluate (typed-function.js:1459:22)

Start by reproducing the reported math.evaluate('tan(pi/2)') case with the shown BigNumber configuration in the mathjs console. Trace the failure through tan.js and the decimal.mjs stack frames, using typed-function.js and FunctionNode.js as needed. Done means the reported trigonometric evaluation no longer raises the precision-limit exception, with regression coverage for the reproduced configuration.

Written by the indexing model from the issue text.