Need Help With Trigonometry? Let Us Point You In The Right Direction!

[majormuss]

Homework Statement

Hi, I scanned some few questions from my Trigonometry book that were giving me giving me problems. I tried them but I could not understand what they were asking for..
Please point me in the right direction and I will do the rest.

Homework Equations

The Attempt at a Solution

 

[Mark44]

Homework Statement

Hi, I scanned some few questions from my Trigonometry book that were giving me giving me problems. I tried them but I could not understand what they were asking for..
Please point me in the right direction and I will do the rest.

26) What identities do you know?
5) Compare sin(5pi/3) with each of the 4 given values. As the problem is written, I see that two of the values are equal.
14) Which quadrants is the tangent function positive in? Negative in?
3) x = arctan(-sqrt(3)) <==> -sqrt(3) = tan(x). Which quadrants could x be in? What values of x give tan(x) = -sqrt(3)?