Page 29 - Spotlight A+ SPM Additional Mathematics Form 4 & 5

Form
5 Additional Mathematics Chapter 1 Circular Measure

CHAP.
1 Concept

Circular Measure

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Conversion of angle measurement

× 180°
π
Radian Degree

π
×
180°

Arc length of a circle Area of sector of a circle

B Q
s r
r
θ θ A s
O
O r A
r
P
1 2
s = qr, q in radian A = 2 qr , q in radian

Sine rule and cosine rule Heron’s formula can
can be used if involving a be used if involving a
triangle triangle

Application

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C01 Spotlight Add Math F5.indd 216 16/04/2021 12:50 PM