Question

dgdsfgds

Answer 1

First of all, if you have available the addition formula for the tangent function, type it out here. If you don't, but know the addition formulas for the sine and cosine, please type them out here. Then we'll get to work.

Answer 2

I'd suggest you go to

http://mathworld.wolfram.com/TrigonometricAdditionFormulas.html

and look for the appropriate formula.

Answer 3

i did but i dont know how to split the 75 up

Answer 4

@mathmale

Answer 5

Hint: It's really easy to find the sine, cosine and tangent of 30 deg and 45 deg.

Answer 6

(1+sqrt3/3)/(1-sqrt3/3). this is wrong as it should be sqrtB-1 not 1-sqrtB

Answer 7

This is an example of my reasons behind asking you to type in the appropriate sum formula for the tangent. I need to see which formula you're using and what you're doing with it.

Answer 8

(4)
tan(alpha+beta) = (tan(alpha)+tan(beta))/(1-tan(alpha)tan(beta))

Answer 9

that's better; thank you.

See http://home.windstream.net/okrebs/page102.html

So: you could arbitrarily let alpha = 45 deg and beta = 30 deg.

what's tan 45 deg? what's tan 30 deg?

These questions are elementary, but I'd like to understand your thought processes.

Answer 10

all i did was plug in 45 for alpha and 30 for beta

Answer 11

tan(45)=1 tan(30)=sqrt3/3

Answer 12

Good. Now let's subst. those into the sum formula for the tangent:

\[\frac{ 1+\frac{ \sqrt{3} }{ 3 } }{ 1-(1)(\frac{ \sqrt{3} }{ 3 }) }\]

Answer 13

OK with that?

Answer 14

In the numerator we have an integer to be combined with a fraction. Result?

Answer 15

Having done this myself, I see we get a result that is somewhat similar to your original assumed answer. I'd still like to see all of your calculations connected with that sum formula for the tangent.

Answer 16

yeah i put this answer into my hw and it said it was wrong. my hw is online

Answer 17

Habib, I need to ask YOU to show me ALL of your work; then I could give you meaningful feedback. I'm far more interested in your reasoning and your evaluation of the pertinent formula than I am in "right" or "wrong" "answers."

Please decide whether or not y ou're willing to type in what you have done.

Answer 18

all i have done is plug in 45 for alpha and 30 for beta. i thought i already said this

Answer 19

Habib, I've asked you several times to show your work; I'd like to see every detail of it. If you don't want to do that for me, fine. Perhaps someone else's approach would better fit your learning style.

Answer 20

Good luck!

Answer 21

that is honestly all the work ive done. i dont know what else to show you. i plugged them in and used a calculator