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Advanced Precalculus Notes 7.1 Right Triangle Trigonometry; Applications. http://id.mind.net/~zona/mmts/trigonometryRealms/introduction/rightTriangle/trigRightTriangle.html The website above provides an interesting demonstration on trig calculations for several angles.

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## Advanced Precalculus Notes 7.1 Right Triangle Trigonometry; Applications

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**Advanced Precalculus Notes 7.1 Right Triangle Trigonometry;**Applications http://id.mind.net/~zona/mmts/trigonometryRealms/introduction/rightTriangle/trigRightTriangle.html The website above provides an interesting demonstration on trig calculations for several angles. Finding the Value of Trig functions from a right triangle:**Constructing a Rain gutter**A rain gutter is to be constructed of aluminum sheets 12 inches wide. After marking off a length of 4 inches from each edge, this length is bent up at an angle . express the area A of the opening as a function of . Graph A = A( ) and find the angle which makes A largest.**Cofunctions of complementary angles are congruent:**Solve the right triangles:**Using a transit, a surveyor took a sighting at a rock across**the river, then turned 90° and walked 200 meters. Using the transit, he again sighted the rock at a 20° angle from the path that he walked. What is the width of the river, rounded to the nearest meter? A straight trail leads from the Alpine Hotel, elevation 8000 feet, to a scenic overlook, at 11,100 feet elevation. The length of the trail is 14,100 feet. What is the inclination (grade) of the trail?**The Model 8339 Laser Ceilometer measures cloud height up**to 30,000 feet by calculating the return time of laser light pulses reflected by the cloud base. Using the ceilometer on a base (distance from the light to the receiver) of 300 feet, it was determined that the angle of elevation of the light detector was 75°. What is the height of the cloud cover? Two observations are taken 400 feet from a flagpole. The angle of elevation to the top of the flag is 56.5° and the angle of elevation to the bottom of the flag is 55.1°. How tall (wide) is the flag?**Assignment: page 527: 1 – 9, 15, 16, 18, 19, 21, 23, 29,**39, 43, 49, 51, 59

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