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PURPLE line: cos(A)
PURPLE line: cos(A)
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15
RED line: sin(A)
RED line: sin(A)
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18
GREEN line: tan(A)
GREEN line: tan(A)
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21
ORANGE line: cot(A)
ORANGE line: cot(A)
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24
PURPLE point: sec(A)
PURPLE point: sec(A)
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27
RED point: csc(A)
RED point: csc(A)
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29
Notice that as the GREEN line, tan(A), gets bigger, the ORANGE line, cot(A), gets smaller. So, tan(A) is the inverse of cot(A).
Notice that as the GREEN line, tan(A), gets bigger, the ORANGE line, cot(A), gets smaller. So, tan(A) is the inverse of cot(A).
31
Notice that as the PURPLE LINE, cos(A), gets bigger, the PURPLE POINT, sec(A), gets closer to circle. So, cos(A) is the inverse of sec(A).
Notice that as the PURPLE LINE, cos(A), gets bigger, the PURPLE POINT, sec(A), gets closer to circle. So, cos(A) is the inverse of sec(A).
32
Notice that as the RED LINE, sin(A), gets bigger, the RED POINT, csc(A), gets closer to circle. So, sin(A) is the inverse of csc(A).
Notice that as the RED LINE, sin(A), gets bigger, the RED POINT, csc(A), gets closer to circle. So, sin(A) is the inverse of csc(A).
33
Expression 34:
34
The table below shows the values of cos(A) (labeled x2) and sin(A) (labeled y2) for the 5 basic angles in trigonometry.
The table below shows the values of cos(A) (labeled x2) and sin(A) (labeled y2) for the 5 basic angles in trigonometry.
35
"x" Subscript, 2 , Baseline
x
2
"y" Subscript, 2 , Baseline Has graph. To audio trace, press ALT+T.
y
2
theta
θ
1
1
0
0
0
0
r1c4:
StartFraction, StartRoot, 3 , EndRoot Over 2 , EndFraction
3
2
1 half
1
2
30
3
0
r2c4:
StartFraction, StartRoot, 2 , EndRoot Over 2 , EndFraction
2
2
StartFraction, StartRoot, 2 , EndRoot Over 2 , EndFraction
2
2
45
4
5
r3c4:
1 half
1
2
StartFraction, StartRoot, 3 , EndRoot Over 2 , EndFraction
3
2
60
6
0
r4c4:
0
0
1
1
90
9
0
r5c4:
r6c4:
r7c4:
36
Misc
Misc
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37
41
powered by
powered by
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
functions
(
(
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)
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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