1. ## Right-Angled Trigonometry

I attached a file with this post see it for the questions

2. Originally Posted by mexicool27
I attached a file with this post see it for the questions
what have you tried for this list of problems?

3. I dont have to try these question I'm busy on other questions

4. I dont even understand 1 word of it i need help

5. Originally Posted by mexicool27
I dont have to try these question I'm busy on other questions
suit yourself.

6. What seems to be the problem here mexicool?

Tell me what you're mainly having trouble with and I'll do my best to help.

In regards to question three:

$\tan35=\frac{1200}{x}$
$x=\frac{1200}{\tan35}$

7. In regards to 2-a:

First find the measure of BC by the pythagorean theorem $a^2+b^2=c^2$

so what do ya need? Well, you need $BC^2+BD^2=CD^2$

but $BC=\sqrt{(16)^2-(7+4)^2}$

once you have found that value, you plug what you know into the above formula to find $CD$.

Then with this information, the Law Of Cosines tells us that if we have 3 sides of an oblique triangle, we can know the value of the angles.

Here's the formula

so let $AC=a$and let $CD=b$and let $AD=c$where cosine of gamma = $\cos{C}$

Plug all this stuff in and slove your triangle!