Hi,

I hope someone can help. I am calculating cos(45 - 60) on my calculator and I get ((square root of 6 + square root of 2)/4)

The answer should actually be the following: https://www.wolframalpha.com/input/?...+-+30+degrees)

Why does my calculator produce a different answer than the answer on Wolfram Alpha? Any reasons?

Sincerely,

Olivia