Chapter 4
Trigonometry
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4.1 Radian and Degree Measures of Angles
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362. RTNTDQR?
NUM
Nê~Ç ≈ °
π
°
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- ê~Ç MKMNTQRPê~Ç
NUM
N ≈
π
°= =
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- ê~Ç MKMMMOVNê~Ç
NUMSM
ND ≈
⋅
π
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- ê~Ç MKMMMMMRê~Ç
NUMPSMM
N? ≈
⋅
π
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M= PM= QR= SM= VM= NUM= OTM= PSM=
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Eê~Çá~åëF= M= S
π
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Q
π
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P
π
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O
π
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O
Pπ
= O=π
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