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Pythagorean Identity
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Expression 19: sine squared alpha plus cosine squared alpha equals 1
s
i
n
2
α
+
c
o
s
2
α
equals
=
1
1
19
Expression 20: sine squared "x" plus cosine squared "x"
s
i
n
2
x
+
c
o
s
2
x
20
21
powered by
powered by
( cosine alpha , sine alpha )
(
c
o
s
α
,
s
i
n
α
)
cosine alpha
c
o
s
α
sine alpha
s
i
n
α
cosine squared alpha
c
o
s
2
α
sine squared alpha
s
i
n
2
α
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
functions
(
(
)
)
less than
<
greater than
>
4
4
5
5
6
6
times
×
| "a" |
|
a
|
,
,
less than or equal to
≤
greater than or equal to
≥
1
1
2
2
3
3
negative
−
A B C
StartRoot, , EndRoot
pi
π
0
0
.
.
equals
=
positive
+
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