Trigonometry unit circle

[Jenndr]

Please help! Any idea on how to do the following:

 

[Deleted member 4993]

Please help! Any idea on how to do the following:

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.

 

[pka]

Please help! Any idea on how to do the following:

You should know that \(\tan(\theta)=\dfrac{opp}{adj}\) therefore \(\tan(30^o)=~?\).

 

[Dr.Peterson]

Please help! Any idea on how to do the following:

I would start by expressing the values of a and b as functions of the angle 30 degrees.

Then, try expressing [MATH]\cos(150^\circ)[/MATH] and [MATH]\sin(-30^\circ)[/MATH] in terms of those two functions.

Please show us anything you are able to do, so we have a starting point to help you.