Float and Double conversion issues

I am getting the error message:

Assets/Code/Player Code/SwordAttack.cs(29,17): error CS0266: Cannot implicitly convert type double' to float'. An explicit conversion exists (are you missing a cast?)

Assets/Code/Player Code/SwordAttack.cs(30,17): error CS0266: Cannot implicitly convert type double' to float'. An explicit conversion exists (are you missing a cast?)

Assets/Code/Player Code/SwordAttack.cs(31,17): error CS0266: Cannot implicitly convert type double' to float'. An explicit conversion exists (are you missing a cast?)

I am not trying to convert anything to double anywhere in my code. I cannot see where it it trying to convert the variable. Any help is greatly appreciated.

 using UnityEngine;
 using System;
 
 [AddComponentMenu("Player/Sword Attack")]
 
 class SwordAttack : MonoBehaviour{
     //finds camera angle x and y for process
     float basecordinantx;
     float basecordinanty1;
     float basecordinanty;
     float basecordinantz;
         //gets mouse cordinants in aray
     int[] sworddirection;
     //processed mouse cordinants
     int[] swordpath;
     //counts the number in the array
     int arraynum;
 
     //particles
     public ParticleSystem SwordLine;
     
     
     void Update()
     {
                 //if left mouse is clicked
         if (Input.GetMouseButton (0))return;
         float camx = Camera.main.transform.eulerAngles.x;
         float camy = Camera.main.transform.eulerAngles.y;
         basecordinantx = Math.Sin (camy);
         basecordinantz = Math.Sin (camx);
         basecordinanty1 = Math.Cos (camx) + Math.Cos (camy);
         basecordinanty = basecordinanty1 / 2;
         Debug.Log (basecordinantx);
         Debug.Log (basecordinanty);
         Debug.Log (basecordinantz);
 
         }