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Wat is the solution for sinx-cosx=2 ? - SoftMath Algebrator - Algebra Homework Solver (689076614429)

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  • calia_onez Mar 18, 2009

    sinx cosx = 0.5

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(sinx+cosx)^2 + (sinx-cosx)^2

Posted on Feb 08, 2009

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Whats the appropriate unit of measure for -5 1/4in - 2 2/3 in

Posted on Aug 26, 2008

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SOURCE: 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.

Posted on Mar 14, 2013

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1 Answer

How can I solve Sinx+cosx=7/5?


Square each side

Sin ^2 (x) + cos ^2 (x) +2 sin (x)cos (x) = 49/25

1 + 2sin (x)cos (x) = 1.960

sin (2x) = 0.960

2x = 73.74 deg

x = 36.87 deg

Sep 07, 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

Differentiate (sin x)x w.r.t. x.


Nevermind, i assume it's an acronym meaning with respect to x.
so the derivative of (sinx)x is: (cosx)(x) + (sinx)(1)
Simplified: xcosx + sinx

Mar 08, 2011 | Cycling

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

1 Answer

When i take the derivative or anti derivative of sinx the answer comes out to be pi*cosx/180...i dont know why it's doing that. how do i fix it???


You're in degrees mode. Press MODE, use down-arrow to get to Angle, press right-arrow and 1 to select RADIAN, then press ENTER to save the change.

Sep 12, 2010 | Texas Instruments TI-89 Calculator

1 Answer

(sin-cos)(sin+cos)


(sinX-cosX)(sinX+cosX) =(sin^2 - Cos^2X)
=Sin^2X - (1-Sin^2X)
=Sin^2X -1 + Sin^2X
=2Sin^2X -1

Zulfikar Ali
ali_zulfikar@yahoo.com
9899780221

Jan 26, 2009 | Super Tutor Trigonometry (ESDTRIG) for PC

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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