Question

Determine the sign of cos pi divided by seven without using a calculator.

Answer 1

See, \[\large{\cos{\pi} = -1}\]

So, can you now tell the sign of \[\large{\cfrac{\cos{\pi}}{7}}\]

Answer 2

so its negative?

Answer 3

Very good , you are correct !!

Answer 4

thank you

Answer 5

no problem :)