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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.