Trigonometry - Cosine rule.
Test Youself 1 - Solutions.
Find a side | 1. | |
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Find an angle. | 7. We are dealing with 3 sides and one angle and need to find the angle: |
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8. We are dealing with 3 sides and one angle and need to find the angle: |
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9. | The smallest angle is always opposite the smallest side. |
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Practical problems. | 13. David is playing golf on a hole which is 330 m long. He hits a good drive of 220 m but pulls it a little and the ball goes straight but to the left at an angle of 8°. How far is David's second shot to the hole? |
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