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Question

Find the radian measure corresponding to the following degree measures:
(i) 300°
(ii) 35°
(iii) −56°
(iv) 135°
(v) −300°
(vi) 7° 30'
(vii) 125° 30'
(viii) −47° 30'

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Solution

We have:180°=π rad1°=π180 rad


i 300°=300×π180=5π3 rad


ii 35°=35×π180=7π36 rad


iii -56°=-56×π180=-14π45 rad


iv 135°=135×π180=3π4 rad

v -300°=-300×π180=-5π3 rad


vi 30'=12°7°30'=712°=152°=152×π180=π24 rad


vii 30'=12°125°30'=12512°=2512°=2512×π180=251π360 rad


viii 30'=12°47°30'=-4712°=-952°=-952×π180=-19π72 rad

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