Difficult Trigonometry (3 Problems)

Mar 2019
14
0
United States
I'm needing some help figuring out how to begin working these problems. I don't very much understand this section of Trigonometry.
(You can click the pictures to see them full size.)

4.04 GA Question 16.PNG
 

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Plato

MHF Helper
Aug 2006
22,474
8,643
I'm needing a walk-through with these problems.
(You can click the pictures to see them full size.)
View attachment 39312View attachment 39313View attachment 39311
It is not the function of this HELP-SITE to offer a walk-through.
You have shown any effort on your part. You may need a private tutor. If that is the case, then you need to look else where.
You post work and we help you understand
The first set of questions are simple half-angle questions.
Show some effort.
 
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Mar 2019
14
0
United States
Well, I will rephrase my question. Thank you for helping me with the half-angles part.
I have no one to tutor me.
Sorry for the intrusion.
 

topsquark

Forum Staff
Jan 2006
11,569
3,453
Wellsville, NY
I'm needing some help figuring out how to begin working these problems. I don't very much understand this section of Trigonometry.
(You can click the pictures to see them full size.)

View attachment 39312
In the future, please post only one question per thread. It just gets messy this way.

For the first attachment maybe it would help for you to tell us what the half-angle formulas are for tangent and cosine?

-Dan
 
Mar 2012
564
29
for question 16 - (a)

here is the half angle formula for tangent



or



you can use either one, then



Just leave the answer like this since the question mentioned that no need to simplify.

for (b) use half angle formula for cosine and follow same style
(c) is similar to (a) just modify the angle
 
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Mar 2012
564
29
question 15 - (a), I leave the reason part for you








question 15 - (b)