# How to develop a formula for cos3x?

Check our answers to ‘How to develop a formula for cos3x?’ - we found 34 replies and comments relevant to this matter. The best answers are submitted by users of Answers.yahoo.com, Yahoo! Answers and ChaCha.

## Best solution

• ### Develop a formula for cos3x in terms of cosx? | Yahoo Answers

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## Other solutions

• ### Develop a formula for cos3x in terms of cosx?

Hello, I need some help on how to express cos 3x in terms of cos x. I realize that you need to use double angle formulas, but I'm not able to group the terms properly in the second step and need some help in finding the final answer. Thanks in advance...

#### Answer:

cos3x = cos (2x+ x) =cos2x*cosx - sin2x*sinx =(2*cos^2 (x) - 1) *cosx - 2sinx*cosx*sinx { since cos...

• ### Given that Venus’ sidereal rotation period is 243.01 days and its orbital period is 224.70 days, develop a for?

Given that Venus’ sidereal rotation period is 243.01 days and its orbital period is 224.70 days, develop a formula and use it to show that a solar day on Venus lasts 116.8 days. (Hint: the formula relating Venus’ solar day to its sidereal rotation period...

#### Answer:

Venus’ sidereal rotation period is 243.01 days and its orbital period is 224.70 days The Sun moves counterclockwise...

• ### What kind of formula or equation would be used to represent this type of data?

I'm not exactly sure if it would be a recursive formula, I can't develop one. The set of data starts at 2, so it looks like 2, 7, 15, 26, 40, 57, 77, 100, 126, etc. where at each interval, the amount added increases by 3. So from 2-7 is 5 7-15 is 8 ...

#### Answer:

y= 1.5x^2 + 0.5x

• ### What pre-calculus formula and representative element are used to develop the integration formula for arc length

#### Answer:

The function to be integrated may be a scalar field or a vector field. The value of the line integral...

• ### What is formula for cos3x?

#### Answer:

looks like the exponents did not show up, in the first it should be 4 cosine cubed x - 3cosx and the...

• ### When is the best time to take a baby off of formula?

My son is 11 1/2 months, he uses Isomil Advance. His grandmother says one year then he can be off formula. I say about a year and a half, because babies still develop and need the vitamins and nurishment from the formula. When my daughter was a baby...

#### Answer:

Ask your pediatrician what their guidelines are but by age 1 babies should be getting lots of other...

• ### Is it possible to develop an allergy to a product that one has used (without issues) for many years?

...such as a cleanser, deodorant, cologne, etc? My favorite cleanser that I've been using to keep my skin silky smooth for years (yes, The Nolte is vain) is suddenly causing my skin to appear blotchy and uneven. Is it possible to develop an allergy overnight...

#### Answer:

Yes. Reformulation is certainly a possibility. You might be able to extract the information from the...

• ### Can older dogs develop pica?

My Labrador retriever recently developed the habit of eating things like dust from under the couches, chewing on socks, and eating grass. She is 10 years old and has never had this problem before. Recently, we switched her food formula to the one for...

#### Answer:

It is not too common, but not the rarest thing either. I do believe it could have to do with her new...

• ### Consider this scenario: if the entire breadth of humanity and its influence were "deleted" from Earth, and then initiated again from the humblest of human beginnings, would determinism dictate that humanity would develop the same way?

Accept determinism as an axiom for a moment to extrapolate this idea. The alternative I'm considering--and preferring--is that humanity would develop in an alternative but formulaic manner. The formula being beyond human capacity--which is sort of a...

#### Answer:

The only way human history would develop to the same present is for everything to start over. If humanity...