This post has been de-listed
It is no longer included in search results and normal feeds (front page, hot posts, subreddit posts, etc). It remains visible only via the author's post history.
3
[High School Math] So our exam just finished and there's this 1 Trig Idendity no one seems to have gotten.
Author Summary
morroblivion is
in
High School Math
Post Body
We're supposed to prove/show that (1 cosx sinx)/(1 sinx-cosx) = (1 cosx)/sinx
What our teacher told us is that we're not supposed to cross multiply when proving identities. Wolfram says it's true but they cross multiplied in the solution.
Extra notes: Our teacher said no properties of equality can be used because at the start , we're not sure if they're equal(identites). WE can however, multiply sides by 1. Example: The right side can be multiplied by (1-cosx)/(1-cosx) since it's equal to 1.
Author
Account Strength
100%
Account Age
12 years
Verified Email
Yes
Verified Flair
No
Total Karma
7,830
Link Karma
620
Comment Karma
7,210
Profile updated: 3 days ago
Posts updated: 7 months ago
Subreddit
Post Details
Location
We try to extract some basic information from the post title. This is not
always successful or accurate, please use your best judgement and compare
these values to the post title and body for confirmation.
- Posted
- 11 years ago
- Reddit URL
- View post on reddit.com
- External URL
- reddit.com/r/learnmath/c...