exam Maths Puzzle Numerical Ability

I am having trouble with evaluating without using a calculator
How do you it?
cos(-45)
tan(1800)
sec(5)

Read Solution (Total 0)

exam Other Question

Solve than graph.

| x | >= 5

x>=(5)

x>=5

x<=-(5)

x<=-5

x>=5 or x<=-5

I solved it but it was wrong. I have a question in geometry about coordinates and graphing, but I cannot exactly scan my book onto the computer, so can you try to find my book and problem?