Math141Mid3S11

# Math141Mid3S11 - Math 141 Name MIDTERM 3 PART 1(CHAPTER 4...

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Math 141 Name: ________________________ MIDTERM 3 – PART 1 (CHAPTER 4) MATH 141 – SPRING 2011 – KUNIYUKI 150 POINTS TOTAL: 35 FOR PART 1, AND 115 FOR PART 2 Show all work, simplify as appropriate, and use “good form and procedure” (as in class). Box in your final answers! No notes or books allowed. PART 1: SCIENTIFIC CALCULATORS ALLOWED! (35 POINTS TOTAL) If you round off at intermediate steps, round off to at least five significant digits. Write units where appropriate in your final answers. 1) A central angle of a circle has measure 0.5 radians. It intercepts an arc of length 12 centimeters along the circle. What is the radius of the circle? (4 points) 2) Give the solutions for sin ± = ² 0.8 , where 0 ± ² < 2 ³ . Give your answers in radians, and round them off to the nearest thousandth of a radian (i.e., to three decimal places). (8 points)

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3) Write sec sin ± 1 x 3 ² ³ ´ µ · ² ³ ´ µ · as an equivalent algebraic expression, as we have done in class. Assume x is in the domain of the expression. (7 points)
4) An airplane is flying at an altitude of 10,000 feet over a flat desert. In other

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Math141Mid3S11 - Math 141 Name MIDTERM 3 PART 1(CHAPTER 4...

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