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Pre-Algebra
Mean
Mode
Greatest Common Factor
Least Common Multiple
Order of Operations
Fractions
Mixed Fractions
Prime Factorization
Exponents
Radicals
Algebra
Combine Like Terms
Solve for a Variable
Factor
Expand
Evaluate Fractions
Linear Equations
Quadratic Equations
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Systems of Equations
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Solve for x
x=\pi n_{1}+\frac{\pi }{4}<br/>n_{1}\in \mathrm{Z}
x
=
π
n
1
+
4
π
n
1
∈
Z
Graph
Graph Both Sides in 2D
Graph in 2D
Quiz
Trigonometry
5 problems similar to:
\sin ( x ) = \cos ( x )
sin
(
x
)
=
cos
(
x
)
Similar Problems from Web Search
How to solve equations like 2 \sin(x) = \cos(x)
How to solve equations like
2
sin
(
x
)
=
cos
(
x
)
https://math.stackexchange.com/questions/1476944/how-to-solve-equations-like-2-sinx-cosx/1476973
One way can be using tan\frac x2=t so sin x=\frac{2t}{1+t^2} and cos x=\frac{1-t^2}{1+t^2}. Here 2sin x= cos x implies t^2+4t-1=0 from wich tan \frac x2=2\pm\sqrt{5}.Hence the answer of ...
One way can be using tan
2
x
=
t
so sin x=
1
+
t
2
2
t
and cos x=
1
+
t
2
1
−
t
2
. Here 2sin x= cos x implies
t
2
+
4
t
−
1
=
0
from wich tan
2
x
=
2
±
5
.Hence the answer of ...
How do you solve \displaystyle{1}+{\sin{{\left({x}\right)}}}={\cos{{\left({x}\right)}}} ?
How do you solve
1
+
sin
(
x
)
=
cos
(
x
)
?
https://socratic.org/questions/how-do-you-solve-1-sin-x-cos-x
\displaystyle{x}={0} Explanation: \displaystyle{1}+{\sin{{\left({x}\right)}}}={\cos{{\left({x}\right)}}}{\quad\text{or}\quad}{\cos{{x}}}-{\sin{{x}}}={1} . Squaring both sides we get \displaystyle{\left({\cos{{x}}}-{\sin{{x}}}\right)}^{{2}}={1}{\quad\text{or}\quad}{{\cos}^{{2}}{x}}+{{\sin}^{{2}}{x}}-{2}{\sin{{x}}}{\cos{{x}}}={1}{\quad\text{or}\quad}{1}-{\sin{{2}}}{x}={1}{\quad\text{or}\quad}{\sin{{2}}}{x}={0}={\sin{{0}}}; ...
x
=
0
Explanation:
1
+
sin
(
x
)
=
cos
(
x
)
or
cos
x
−
sin
x
=
1
. Squaring both sides we get
(
cos
x
−
sin
x
)
2
=
1
or
cos
2
x
+
sin
2
x
−
2
sin
x
cos
x
=
1
or
1
−
sin
2
x
=
1
or
sin
2
x
=
0
=
sin
0
;
...
How do you show that the equation \displaystyle{1}-{\sin{{x}}}={\cos{{x}}} is not an identity?
How do you show that the equation
1
−
sin
x
=
cos
x
is not an identity?
https://socratic.org/questions/how-do-you-show-that-the-equation-1-sinx-cosx-is-not-an-identity
Bdub Nov 12, 2016 Pick a value for x like \displaystyle\frac{\pi}{{3}} and plug it in to both side to show that they don't equal each other and therefore not an identity
Bdub Nov 12, 2016 Pick a value for x like
3
π
and plug it in to both side to show that they don't equal each other and therefore not an identity
Trigonometric equation \sin2x=\cos x
Trigonometric equation
sin
2
x
=
cos
x
https://math.stackexchange.com/questions/3008492/trigonometric-equation-sin2x-cos-x
As @Nicholas Stull hinted, you lost solutions by not making sure that you were not dividing by zero. As @Winther pointed out, you can avoid this error by factoring. As @Nicholas Stull pointed out, ...
As @Nicholas Stull hinted, you lost solutions by not making sure that you were not dividing by zero. As @Winther pointed out, you can avoid this error by factoring. As @Nicholas Stull pointed out, ...
If \sin(x)=3\cos(x), compute \sin(x)*\cos(x) [closed]
If
sin
(
x
)
=
3
cos
(
x
)
, compute
sin
(
x
)
∗
cos
(
x
)
[closed]
https://math.stackexchange.com/questions/2685713/if-sinx-3-cosx-compute-sinx-cosx
We have \tan(x) = 3 Draw a right angle triangle where x is one of the angle, let the opposite side be of length 3, let the adjacent side be of length one. Then by Pythagoras Theorem, the ...
We have
tan
(
x
)
=
3
Draw a right angle triangle where
x
is one of the angle, let the opposite side be of length
3
, let the adjacent side be of length one. Then by Pythagoras Theorem, the ...
Find \sin x \cos x if \sin x = 4 \cos x
Find
sin
x
cos
x
if
sin
x
=
4
cos
x
https://math.stackexchange.com/questions/1092322/find-sin-x-cos-x-if-sin-x-4-cos-x
Hint Maybe starting with \sin^2 x + \cos^2 x = 1 is helpful :)
Hint Maybe starting with
sin
2
x
+
cos
2
x
=
1
is helpful :)
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\tan ( x )
tan
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\sin ( x ) = \cos ( x )
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