Question

Prove: tan 30˚- sec 240˚ = (6+√3)/3

Answer 1

You have to set up your angles to find out what the tan and sec of those are. Like this:

Answer 2

What is the tangent of that 30 degree angle?

Answer 3

And then do the same for the sec of 240. The secant of an angle is the same as 1/cos...yes?

Answer 4

yes... i see

Answer 5

The 240 degree angle has a coterminal angle value of 60.