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Trigonometry Examples
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Trigonometry
Solve for x sin(x+20)=cos(x)
sin
(
x
+
20
)
=
cos
(
x
)
sin
(
x
+
20
)
=
cos
(
x
)
Step 1
Graph
each side of the
equation
. The
solution
is the x-value of the
point
of
intersection
.
x
≈
0.21017612
+
π
n
x
≈
0.21017612
+
π
n
, for any
integer
n
n
Step 2
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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