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# Class 10 Math Intoduction to Geometry

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$2. Write short answers of the following questions.(iv) Define radian measure of an angle.$

4. Express the following angles into radians.(viii) 315^{\circ}

$4. Express the following angles into radians.(viii) 315^{\circ}$

1. Locate the following angles:(vii) -150^{\circ}

$1. Locate the following angles:(vii) -150^{\circ}$

Example: Locate each angle in standard position.(iii) -270^{\circ}

$Example: Locate each angle in standard position.(iii) -270^{\circ}$

2. Identify the closest rantal angles between which the following angles lies.(iii) 572^{\circ}

$2. Identify the closest rantal angles between which the following angles lies.(iii) 572^{\circ}$

In problems 7-24 verify the identities.21. \sin ^{3} \theta=\sin \theta-\sin \theta \cos ^{2} \theta

$In problems 7-24 verify the identities.21. \sin ^{3} \theta=\sin \theta-\sin \theta \cos ^{2} \theta$

Example 1: A flagpole 17.9 meter high casts a 7 meter shadow Find the angle of elevation of the sun.

$Example 1: A flagpole 17.9 meter high casts a 7 meter shadow Find the angle of elevation of the sun.$