Sin 45 + cos 60+cos (330) Срочно!ю!

Question

Sin 45 + cos 60+cos (330) Срочно!ю!

Answer 1

Sin45° = √2/2
Сos60° = 1/2
Cos330° = Cos(360° -30°) = Cos30°= √3/2
сам пример: √2/2 +1/2 /√3/2= (√2 +1 +√3)/2