what is the exact value of cos 33 in terms of its cofunction

Answer 1

Hi Falak,

The cofunction of cosine is the sine function.

The rule with cofunctions like this is that cos(x) = sin(90 - x)

This means that cos(33) = sin(90.- 33) = sin(67).

The problem only asks us to go this far, and not to find the sin(67).

Please let me know if I can be more helpful, thanks!

Joe