Here's the question:

State an equivalent expression forin terms of the related acute angle.The answer is

What is the step-by-step solution. Thanks!

- November 19th 2008, 04:56 PMessaymastersEquivalent Expression in terms of Related Acute Angle [Year 11 Advanced Functions]
Here's the question:

**State an equivalent expression for****in terms of the related acute angle.**The answer is

What is the step-by-step solution. Thanks! - November 19th 2008, 05:04 PMJhevon
the reference angle for is .

is in the 3rd quadrant, and so we get a negative answer. since the secant function is negative in the second and third quadrant, the other reference angle that we could take is

draw the unit circle at draw these angles in to see what's going on. note that and make an angle of with the negative x-axis. - November 19th 2008, 05:07 PMessaymasters
Cheers Jhevon!

So what I should do is pick an angle on a valid quadrant that has the same related angle, yeah?