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# Tangent Ratio

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A short power point on using the Tangent ratio to find unknown sides.

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### Tangent Ratio

1. 1. Tangent Ratio<br />
2. 2. What is a Tangent?<br /><ul><li>“Going off on a Tangent”
3. 3. Meaning: to move away from the main point</li></li></ul><li>What is a Tangent?<br /><ul><li>“Going off on a Tangent”
4. 4. Meaning: to move away from the main point
5. 5. A straight line drawn from a circle’s circumference
6. 6. The trigonometric function</li></ul>Tan θ = O/A<br />
7. 7. Lets have a look at an example:<br />We know that <br />Tan θ = O/A<br />Take a right angled triangle:<br />So...<br />θ<br />...if we know two out of O, A or θ... <br />A<br />...then we can always find the third piece of Information.<br />O<br />
8. 8. What length is the opposite side going to be?<br />Try this...<br />Start with: Tan 40˚ = O/7<br />40˚<br />Rearrange so: 7×Tan 40˚ = O<br />7<br /> Use your calculator to get O = 5.874 (3 d.p)<br />Easy!<br />Opposite<br />
9. 9. Hope you enjoyed the slideshowby Mr Harold<br />