This chapter is so confusing to me. Is there a simple way to go about this?

find a numerical value of one triganomic function of each x.

2 sin^2x = 3 cos^2x

1-sin^2x = 1/9

1+ tan^2x = sin^2x + 1/sec^2x

Printable View

- January 24th 2006, 11:30 AMmathAna1ys!5numerical value (trig)
This chapter is so confusing to me. Is there a simple way to go about this?

find a numerical value of one triganomic function of each x.

2 sin^2x = 3 cos^2x

1-sin^2x = 1/9

1+ tan^2x = sin^2x + 1/sec^2x - January 24th 2006, 11:57 AMThePerfectHacker
First one,

Use identity .

Thus,

Thus, open parantheses,

Thus,

Thus,

Thus,

Thus, all non-cotermial angles are, (use the arcsin)

- January 24th 2006, 12:03 PMThePerfectHacker
Second one,

Use identity

Thus,

Thus,

Thus, all the non-coterminal angles, (use arccos)

- January 24th 2006, 12:09 PMThePerfectHacker
Problem 3,

Use identity

Thus,

Use identity

Thus,

Thus,

Thus,

Thus, all the non-coterminal angles, (use arctan)

.

Q.E.D. - January 24th 2006, 12:10 PMmathAna1ys!5
so more than one problem relating to the same topic counts as multiple posts?

- January 24th 2006, 12:26 PMThePerfectHacker
I saw that you made multiple posts on the topic of trigonometry. I do not think you want to "spam" the forum. I would allow it, but be careful and do not start asking the same question everywhere, because then we, the moderators, have to waste time deleting them. CaptainBlack already banned a person for 1 day for doing "spamming".

- January 24th 2006, 01:36 PMCaptainBlackQuote:

Originally Posted by**ThePerfectHacker**

fora, at most I may have deleted all but one.

The person in question posted exactly the same message 5 times (and may

have been still posting copies when I banned them), and the message was

not a question but publicity for their web site (admittedly mathematical).

As it is I have left one copy of their message online.

I must confess to being touchy about spam on message boards, and if I

have the ability to stop it I will. I have seen enough good sites ruined by

spam.

RonL