Question

How do i do these?

Evaluate:
1. cos 87 degree 20'
2. sin 6 degree 50'
3. sec 51 degree 30'
4. csc 62 degree 10'
5. cos 24 degree 43'

Answer 1

with a calculator
but one step first

Answer 2

Or wolfram

Answer 3

but I don't trust him -.-

Answer 4

\[20'=\frac{20}{60}=\frac{1}{3}=0.333333...\]so you need to put in \(\cos(87.3333)\) because your calculator works with decimals, not minutes

Answer 5

or try this
http://www.wolframalpha.com/input/?i=cos%2887^o20%27%29