Saturday, 22 October 2011

Solving Problems Using Acute Triangles

Today we used the cosine law hte sine law and the primary trigonometric ratios to figure out the side lengths angle angle measures of acute triangles. we did an example in class where manuel wanted to see how high the worlds tallest free-standing totum pole was. Manuel walked out how far the shadow was 42m and then saw the angle of elevation of the sun was 40 degrees. Manuel realized there was a 5 degree slope to the ground. he found the angle at the base of the totum pole was 85 degrees and that the other angle to the ground was 45 degrees he then found the third angle to be 50 degrees using sine law he found the height to be 38.768m tall










next will be Allysa

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