'Angular - How to build calculator with mathematical opeartions and trignomatic operations?

I want to build on calculator in Angular. I want to implement Trigonometric operations in my calculator any suggestion how to implement Trigonometric operations?

Here is my .ts file

doCalculation(op: any , secondOp: any){
switch (op){
  case '+': {
    return this.firstOperand += secondOp; 
  }
  case '-': {
    return this.firstOperand -= secondOp; 
  }
  case '*': {
    return this.firstOperand *= secondOp; 
  }
  case '/': {
    return this.firstOperand /= secondOp; 
  }
  case '=':{
    return secondOp;
  }
  default:  
}
}

Can I perform Trigonometric operations in switch case statement in my code. If yes please let me know how and any alternative suggestion welcome. Thanks in advance.

angular

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'Angular - How to build calculator with mathematical opeartions and trignomatic operations?

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