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Its all about the trigonometric ratios - Computers & Internet

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Sinx+sinpower2x=1 then cospower8x+2cospower6x +cospower4x is how much

Posted on Feb 02, 2009

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Please explain how you do ratios


A ratio can be simplified by dividing both sides of the ratio by the Highest Common Factor (HCF). The highest common factor is the largest number that goes into both numbers of your ratio. In example 1 you are asked to simplify the ratio 6:8. Here the HCF is 2 so divide both sides of the ratio by 2 to give 3:4.

https://www.youtube.com/watch?v=cbjQWf411O8

Mar 04, 2015 | The Learning Company Achieve! Math &...

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How do i do eqivalent ratios


Ratios are like fractions: to make an equivalent ratio you simply multiply both sides of the ratio by the same non-zero number. 1:2 is equivalent to 2:4 (both sides multiplied by 2). 10:12 is equivalent to 5:6 (both sides multiplied by 1/2).

Nov 09, 2014 | Computers & Internet

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Mathematics sign in


It is not possible to give a general answer to such a question. If you have a fraction, simplifying it entails dividing by factors that are common to the denominator and the numerator. If you have an algebraic expression such as a polynomial you simplify it by combining like terms until you have only one term of each type. A trigonometric expression can be compacted, etc.

May 27, 2014 | Computers & Internet

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I need to rewrite Y=5(sqrt2)sin(x)-5(sqrt2)cos(x) as Y=Asin(Bx-c)


Use the fact that cos(pi/4)=sin(pi/4)= 1/square root(2). Trigonometric identity cos(a+b)=cos(a)cos(b)-sin(a)sin(b).

1_22_2012_4_04_59_am.jpg

Nov 07, 2010 | SoftMath Algebrator - Algebra Homework...

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The ratio of a to b is 2 to 5 and the ratio of b to c is 3 to 4, what is the ratio of a to c


To solve this, you need to multiply the ratios together.
(2/5)*(3/4) = A/C
So (2*3)/(5*4) = A/C
6/20 = A/C
You can reduce that be dividing both sides by 2
3/10 = A/C

Here is an example:
Let X = 3
The problem states that A/B = 2/5
So let A = 2X & B = 5X
A = 2*(3) = 6
B = 5*(3) = 15
Now check the ratio: 6/15 = 2/5. The same as what was given.
Now lets look at the ratio for B/C. The given ratio for B/C was 3/4
Using the value of B that we just solved we get:
B = 15
C = (4/3)*15 = 20
Check the ratio.
15/20 = 3/4
Now we have the values for each of the variables
A = 6
B = 15
C = 20
The ratio of A/C is 6/20
6/20 can be reduced to 3/10 be dividing both numbers by 2

Aug 22, 2010 | The Learning Company Achieve! Math &...

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Ratios


1/25 IS the ratio of 1 to 25. There is not much you can say about it.
Can it be reduced to simpler terms? No! because there no factor common to the numerator (1) and the denominator (25) which you can simplify.
So 1/25 is in its reduced form.

Case of the ratio 2/100
It is clear that we can write the numerator as 1*2. To hope to reduce the ratio to simpler terms we must be able to find a factor that is common to the numerator and the denominator.

Although 100 =1*100=2*50=4*25=4*5*5 it is clear that the only factors common to 2 and 100 are 1, and 2.
To take 1 amounts to doing nothing, but if we take 2 we can write
2/100= (2*1)/(2*50)
Simplifying by 2 (the two 2 cancel each other) we get
2/100=1/50
That is the reduced form.

May 26, 2010 | Vivendi Excel@ Mathematics Study Skills...

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Trigonometric word problem with solution


If the distance of a person from a tower is 100 m and the angle subtended by the top of the tower with the ground is 30o, what is the height of the tower in meters? Solution:
tower.gif
  • AB = distance of the man from the tower = 100 m

  • BC = height of the tower = h (to be calculated)

  • The trigonometric function that uses AB and BC is tan A , where A = 30o.
So tan 30o = BC / AB = h / 100 Therefore height of the tower h = 100 tan 30o = (100) 1/√3 = 57.74 m.

Jan 09, 2010 | Mathsoft StudyWorks! Mathematics Deluxe...

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Trigonometric identity


hi,

try to go to this page and you will find lots of ebook related to what you are looking for.

http://www.pdf-search-engine.com/identities-trigonometry--pdf.html

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Mar 22, 2009 | Computers & Internet

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