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If asinx =bsin(x+2*180/3)= csin(x+4*180/3); prove that ab+bc+ac=0

* = multiply
asinx = a*sinx

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Asinx=bsin(2x*60)=120x

Posted on Jun 05, 2009

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What is the equivalent fraction to 0/2?


If we have no pizza, and divided it between you and me, how much do we get? ZERO.

However, you want equivalent fractions to 0/2. To get an equivalent fraction, you multiply the numerator (the number on the top) and the denominator (the number on the bottom) by the same number.

So we can multiply the top and bottom by 2.

0 x 2 = 0
2 x 2 = 4

So an equivalent fraction would be 0/4.

Good luck.

Paul

Mar 18, 2015 | Office Equipment & Supplies

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A right angle triangle with length of AB 10cm and AC 20cm, how do I find the angle of BC


Assuming that the angle at A is the right angle, Pythagoras' theorem says that the length of the hypotenuse (the side opposite the right angle) is the square root of the sum of the squares of the other two sides. In your case, AB and AC are 'the other two sides' and BC is the hypotenuse, so:

/ 2 2 /
length BC = V 10 + 20 = V 100 + 400


= V 500 = 22.36 cm

(To find the angle at C, you need trigonometry and is arc-tan(10/20)

and the angle at B is arc-tan(20/10) - 26.5 deg and 63.5 deg)

Oct 17, 2014 | Computers & Internet

1 Answer

Use the identity tan(x/2)=sinx/1+cosx to solve for the value of tan45 degrees


tan(x/2)=sin(x)/(1+cos(x))
Setting x/2=45, means that x=90 (degrees)
But cos(90)=0 and sin(90)=1. Thus tan(45)=1/(1+0)=1.

Mar 13, 2013 | SoftMath Algebrator - Algebra Homework...

1 Answer

SinX-cosX=4 how can this be solved?


I gues this problem has no solution because both
SinX and cosX should be between -1 and +1 so it's not possible that value of SinX - cosX should be 4

Dec 12, 2010 | ValuSoft Bible Collection (10281) for PC

2 Answers

4x-(2x-3)=0


4x-(2x-3)=0
=>4x-2x+3=0 ; (after the bracket's oepned and multiplied by - [minus])
=>2x+3=0 ; taken x as common and 4-2=2 i.e. x(4-2) = 2x
=>2x=-3 ; +3's moved on the right-hand side, so it becomes -3
=>x=-3/2 ; 2 has been moved to the right-hand side and divided with -3 i.e 1/2 multiplied by -3 = -3/2

Hence, x = -3/2


Good luck.

Thanks for using FixYa.

Aug 13, 2010 | SoftMath Algebrator - Algebra Homework...

1 Answer

UNDERSTANDING MATH PROPERTIES OF REAL NUMBERS


Hii,here is list of basic real numbers properties applying them you can solve the problems easily.


Assuming a,b,c,d are real numbers:

1)Commutative Property
a) Property of Addition: a+b = b+a
b)Property of Multiplication: ab = ba


2)Associative Property
a)Property of Addition: (a+b) + c = a + (b + c)
b)Property of Multiplication: ( ab )c = a ( bc )


3)Additive Identity:
a+0 = a where 0 is the additive identity
4)Additive Inverse:
For real number a, there exists -a such that
a+(-a) = 0
5)Multiplicative Identity:
For real number a,
1 X a = a
where 1 is the multiplicative identity
6)Multiplicative Inverse:
For real number X where a≠0, there exists 1/asuch that
a X(1/a) = 1
7)Zero Product Law:
If ab = 0, then a=0 or b=0 or both a and b = 0.

8)Distributive Properties:
a)Left distributive law
a (b + c ) = ab + ac
b)Right distributive law
(a + b) c = ac+ bc

Jun 09, 2010 | Vivendi Excel@ Mathematics Study Skills...

1 Answer

In triangle ABC, the bisector of B and C angle meet P. Through P a straight line MN is drawn parallel to BC. Prove that MN=BM+CN


Assuming M is the intersection of MN with AB, and N is the intersection of MN and AC:

Angle ACP = angle BCP (by definition)
Angle NCP = angle BCP (intersection of line with parallel lines produces equal angles)
Triangle CPN is isoceles (two equal angles), and line NP = CN

Same argument for line MP = BM

Therefore NP + MP (i.e, MN) = CN + BM

Sep 08, 2009 | Canon Office Equipment & Supplies

1 Answer

Cscx = 2 and cscx = -2


cscx=2 which can also be written as 1/sinx = 2/1
do the recipricol (flip it) and sinx = 1/2 which is pie/6 or 30 degrees.

Feb 25, 2009 | SoftMath Algebrator - Algebra Homework...

3 Answers

Sinx+cosx=5, tanx+secx=3 then sinx=?


tanx= sinx/cosx,
secx=1/cosx
1+sinx/cosx=3
1+sinx=3cosx---------->1
cosx=5-sinx------------->2

sub 2 in 1
1+sinx=3(5-sinx)
1+sinx=15-3sinx
1+4sinx=15
4sinx=14
sinx=14/4...
this is the solution..

Jul 14, 2008 | ValuSoft Bible Collection (10281) for PC

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