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6.4.2 sum and difference formulas
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Northside ISD
该文档讨论了使用正弦和余弦的和差公式来计算角度的精确值,包括在弧度下的计算示例。文档中提供了多种示例和公式,涉及三角函数的基本操作和合成。内容涵盖了角度相加和相减的不同方式,包括相关的数学推导和示例。
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6.4.2 sum and difference formulas
1.
Using Sum/Difference to
Find Exact Values (Angles Measured in Radians)
2.
cos cos
cos sin sin cos cos cos sin sin
3.
7 12cos 3
4cos 3 4 3 4cos cos sin sin 1 2 3 2 2 2 2 2 2 6 4 4 1 4 2 6
4.
7 12cos 3 4
6cos 3 3 4 6 4 6cos cos sin sin 2 3 2 1 2 2 2 2 6 2 4 4 1 4 2 6
5.
sin sin
cos cos sin sin sin cos cos sin
6.
5 12sin 6
4sin 6 4 6 4sin cos cos sin 1 2 3 2 2 2 2 2 2 6 4 4 1 4 2 6
7.
sin75 2 3
4sin 2 2 3 4 3 4sin cos cos sin 3 2 1 2 2 2 2 2 6 2 4 4 1 4 6 2
8.
tan tan tan 1
tan tan tan tan tan 1 tan tan
9.
13 12tan 3 4
3tan 4 3 4 3 tan tan 1 tan tan 1 3 1 1 3 1 3 1 3 1 3 1 3 4 2 3 1 3 4 2 3 2 2 3
10.
13 12tan 4 3
4tan 4 3 4 4 3 4 tan tan 1 tan tan 3 1 1 3 1 3 1 1 3 1 3 1 3 4 2 3 1 3 4 2 3 2 2 3
11.
5 5 12 12
12 12sin cos cos sin sin cos cos sin sin 5 12 12sin 2sin 1
12.
2 2 9 9
9 9cos cos sin sin cos cos sin sin cos 2 9 9cos 3cos 1 2
13.
p. 481 #
9 - 12, 17 - 20, 27 - 30
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