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Matematik Tambahan Tingkatan 5 Bab 1 Sukatan Membulat

(b) 157°16’ (c) 247°54’
Gunakan/Use Gunakan/Use
157°16’ = q rad 247°54’ = q rad

1 360° 2π rad 360° 2π rad
q = 157°16’ × 2π q = 247°54’ × 2π
360° 360°
= 2.745 rad
= 4.327 rad
BAB (d) 303.68° (e) 354.74°

Gunakan/Use Gunakan/Use
303.68° q rad 354.74° q rad
= =
360° 2π rad 360° 2π rad
303.68° × 2π 354.74° × 2π
q = q =
360° 360°
= 5.3 rad = 6.191 rad

2. Tukarkan setiap yang berikut kepada darjah dan minit.
Convert each of the following into degree and minutes. TP 1
CONTOH (a) 2 π rad
3
3.2 rad 2
π rad
Penyelesaian: q° = 3
Gunakan/Use 360° 2π rad
q q rad 2
= 360° × π
360° 2π rad q° = 3
q 3.2 rad 2π
= = 120°
360° 2π rad
360° × 3.2
q =
2π
= 183.21’ atau/or 183.35°

4 (c) 4.65 rad
(b) rad
9
4 rad q° = 4.65 rad
q° 9 360° 2π rad
=
360° 2π rad 360° × 4.65
4 q° =
360° × 2π
q° = 9 = 266.43° atau/or 266°26’
2π
= 25.46° atau/or 25°28’
(d) 1.67π rad (e) 0.72π rad
q° 0.72π rad
q° 1.67π rad =
= 360° 2π rad
360° 2π rad
360° × 1.67π q° = 360° × 0.72π
q° = 2π
2π
= 300.6° atau/or 300°36’ = 129.6° atau/or 129°36’

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