- #1

- 5

- 0

tan 11 pi

-----

8

and cot 195

also, how would you prove tan (x +y ) = tan x

and tan ( pi/4 -x) = 1 - tan x

---------

1 + tan x

thank you so much for any help

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter quantumgenius
- Start date

- #1

- 5

- 0

tan 11 pi

-----

8

and cot 195

also, how would you prove tan (x +y ) = tan x

and tan ( pi/4 -x) = 1 - tan x

---------

1 + tan x

thank you so much for any help

- #2

- 5

- 0

the -------------- and what's under that belongs on the right side of the equation

- #3

Integral

Staff Emeritus

Science Advisor

Gold Member

- 7,224

- 63

Please read https://www.physicsforums.com/showthread.php?t=8997" and use LaTex for your equations. This will make it much easier for us to help you.

Also I am moving this to the homework help forum, in the future please post this type of question there.

Also I am moving this to the homework help forum, in the future please post this type of question there.

Last edited by a moderator:

- #4

- 29

- 0

latex is a good tool, im learnign it myself

- #5

HallsofIvy

Science Advisor

Homework Helper

- 41,847

- 969

It's really a very bad idea to mix radians and degrees which it looks like you are doing here. Do you know what tan([itex]\pi/4[/itex]) is? Do you know the "half angle" formula for tangent?using those formulas, how would you solve

tan 11 pi

-----

8

and cot 195

You wouldn't- it's not true!also, how would you prove tan (x +y ) = tan x

Whatand tan ( pi/4 -x) = 1 - tan x

---------

1 + tan x

thank you so much for any help[/QUOTE]

Share: