2 files changed, 5 insertions, 3 deletions
diff --git a/calc.go b/calc.go
index 1d969cc..8a114a4 100644
--- a/calc.go
+++ b/calc.go
@@ -5,11 +5,11 @@ import (
 	"strings"
 )
 
-type AngleMode int
+type AngleMode bool
 
 const (
-	modeDeg = iota
-	modeRad
+	modeDeg = false
+	modeRad = true
 )
 
 type Calculator struct {
diff --git a/ui.go b/ui.go
index 877f11b..1360bcd 100644
--- a/ui.go
+++ b/ui.go
@@ -44,6 +44,8 @@ func (ui UI) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case "C":
 			ui.calc.buf = ""
 			ui.calc.stack = ui.calc.stack[:0]
+		case "A":
+			ui.calc.anglem = !ui.calc.anglem
 		case "N":
 			ui.calc.negate()
 		case "+", "-", "*", "/", "%", "^":