TrigonometryWorkPlan_03 - TRIGONOMETRYWORKPLAN Week3...

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TRIGONOMETRY WORKPLAN Week 3 LECTURE I. Trigonometric Functions a. Trig Functions of a Right Triangle i. Sine Function 1. sinA = opposite/hypotenuse = a/c ii. Cosine Function 1. cosA = adjacent/hypotenuse = b/c iii. Tangent Function 1. tanA = opposite/adjacent = a/b iv. Cosecant Function 1. cscA = hypotenuse/opposite = c/a v. Secant Function 1. secA = hypotenuse/adjacent = c/b vi. Cotangent Function 1. cotA = adjacent/opposite = b/a a. Ex. Doug’s golf cart is having a problem. It can’t go up an incline that’s steeper  than 30 degrees. He wants to drive it up a ramp to the top of a 40 foot high  platform. How long a ramp will he need?  Ans. 80ft b. Ex. Jim and Jane are walking east toward the main road. Jane decides to cut  diagonally to the north at an angle of 30 degrees north of east. Jim continues on  for the last 20 feet to the road. How far apart are they when they both reach the  road?  Ans. 11.5 ft c. When Attila leans his ladder against the castle wall, the base of the ladder in 9 
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This note was uploaded on 02/15/2011 for the course GSB 4346 taught by Professor Sss during the Spring '10 term at De La Salle University.

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TrigonometryWorkPlan_03 - TRIGONOMETRYWORKPLAN Week3...

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