- #1

majinknight

- 53

- 0

Sin(45ds+x) +cos(45ds+x) = sqaureroot2 cosx.

Ok so i did left side first and changed it to.

Sin45Cosy + Cos45Siny +Cos45Cosy - Sin45Siny

Now what i want to do is divide out the CosY and Sin Y but even if i do that it doesn't make square root two and i don't know what to do from there. Can you help me solve this last practise question.