Question

What is cos45degrees? work shown please

Answer 1

Answer:
`(1)/(√(2))`

Explanation:

The value of
`\cos 45^(\circ)` is the fixed value i.e.
`(1)/(√(2))`

The values of cosine changes from a maximum at
`0^(\circ)` to a minimum at
`180^(\circ)`

for example,
`\cos 0^(\circ)=1, \quad \cos 90^(\circ)=0,\quad \cos 180^(\circ)=-1`