Trigonometry - Trigonometry in Two and Three Dimensions
Trigonometry - Trigonometry in Two and Three Dimensions
Secondary 3
- The trigonometric concepts you have learned so far is often applied to solve \(3\)-D problems.
- Let’s recall all the trigonometric concepts you have learned thus far.
RIGHT-ANGLED TRIANGLES
| ANY TYPES OF TRIANGLES
|
The technique is to
- If the degree of accuracy is not specified in the question, and if the answer is not exact, correct to \(3\) significant figures. Answer in degree, give to \(1\) decimal place.
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Answer:Use trigonometric ratios or Pythagoras' theorem for right-angled triangles, and the sine or cosine rule for non-right-angled triangles. Reduce a \(3\)-D problem to suitable \(2\)-D planes. Unless otherwise stated, give non-exact answers to \(3\) significant figures and angles to \(1\) decimal place.
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