Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
MTH 113 Practice Problems for Test 1 Sections 4.1-4.8 The given angle is in standard position. Determine the quadrant in which the angle lies. 1) 139° Find a positive angle less than 360° that is coterminal with the given angle. 15) -234° 2) -52° 16) -1335° 3) -342° Classify the angle as acute, right, obtuse, or straight. 4) 7.64° 5) π 2 17) 5π 2 18) 10π 3 Find the length of the arc on a circle of radius r intercepted by a central angle θ. Round answer to two decimal places. 19) r = 50 inches, θ = 20° 6) 114° Find the radian measure of the central angle of a circle of radius r that intercepts an arc of length s. 1 7) r = feet, s = 7 feet 3 Solve the problem. 20) The minute hand of a clock is 4 inches long. How far does the tip of the minute hand move in 15 minutes? If necessary, round the answer to two decimal places. 8) r = 1 meter, s = 200 centimeters 21) A car wheel has a 16-inch radius. Through what angle (to the nearest tenth of a degree) does the wheel turn when the car rolls forward 3 ft? Convert the angle in degrees to radians. Express answer as a multiple of π. 9) 54° 10) - 480° The point P on the unit circle that corresponds to a real number t is given. Find the values of the indicated trigonometric function at t. 77 2 Find tan t. 22) , 9 9 Convert the angle in radians to degrees. π 11) - 5 12) - 35 π 9 Convert the angle in degrees to radians. Round to two decimal places. 13) 194° 23) 55 3 , 8 8 Find sin t. 24) 7 3 , 4 4 Find sec t. Find the reference angle for the given angle. 25) 436° Convert the angle in radians to degrees. Round to two decimal places. 14) -2.54 radians 26) 62° 1 27) -229° 28) - 29) - 30) 31) 13π 12 3π 4 5π 4 29π 3 14π 3 43) cot 17π 4 44) cos 35π 6 45) tan -7π 4 46) csc 960° Use your unit circle knowledge and reference angles to find the exact value of the expression. π 32) sec 6 33) sin 42) cos 47) cot -29π 6 Use a calculator to find the value of the trigonometric function to four decimal places. 48) sin 0.4 -2π 3 49) tan 3.9 π 34) cos 3 50) cos 2π 7 7π 6 51) cot 0.1975 36) cot 3π 2 52) sec 37) sec π 4 35) tan Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give an exact answer with a rational denominator. 53) π 38) sin (- ) 6 39) cot - π 10 π 6 2 5 40) sin (-120°) Find sin θ. 41) cos 5π 4 2 54) Graph the function. 65) y = 2 sin 2x y 2 3 9 Find csc θ. -2π Solve the problem. 55) A radio transmission tower is 250 feet tall. How long should a guy wire be if it is to be attached 10 feet from the top and is to make an angle of 22° with the ground? Give your answer to the nearest tenth of a foot. -π π 2π x -3 66) y = 2 sin (2x - π) 56) What is the domain of the cosine function? Write your answer in interval notation. y 3 57) What is the range of the cosine function? Write your answer in interval notation. -π Find the exact value of the indicated trigonometric function of θ. 9 58) sec θ = , θ in quadrant IV Find tan θ. 2 8 59) tan θ = - , θ in quadrant II 3 -π 2 π 2 π π 4 π 2 x -3 Find cos θ. 67) y = 3 cos (4x - π) y 15 3π < θ < 2π 60) cos θ = , 2 17 Find cot θ. 3 Determine the amplitude and the period.. 1 61) y = 4 sin x 3 -π 2 -π 4 -3 7 8π 62) y = cos x 8 5 Determine the phase shift of the function. 1 63) y = sin (4x + π) 4 π 64) y = 2 sin (x - ) 4 3 x Use a vertical shift to graph the function. 1 68) y = 2 cos x + 2 2 71) y = 2 sec x + π 2 y 8 6 6 y 4 4 2 2 -2π -π -π π 2π -2 π x -4 x -6 -2 -8 -4 -6 Find the exact value of the expression. 3 72) sin-1 2 Graph the function. 69) y = tan x 73) sin-1 1 y 2 2 74) cos-1 - 2 1 75) cos-1 (-1) π 2 -π 2 -π π 3π 2 2π 5π 2 3π x 76) cos-1 -1 3 2 -2 77) tan-1 1 78) tan-1 0 70) y = cot x y Use a calculator to find the value of the expression rounded to two decimal places. 79) tan-1 (-1.8) 2 1 -π π 2 -π 2 π 3π 2 2π 5π 2 3π 1 80) cos-1 - 3 x -1 81) sin-1 -2 4 5 3 Find the exact value of the expression, if possible. Do not use a calculator. 6π 82) sin-1 sin 7 6π 83) tan-1 tan 7 Use a sketch to find the exact value of the expression. 3 84) cos sin-1 5 5 85) cos tan-1 8 5 Answer Key Testname: MTH 113 TEST 1 PRACTICE SUMMER 2013 1) 2) 3) 4) 5) 6) 7) 8) Quadrant II Quadrant IV Quadrant I acute right obtuse 21 radians 2 radians 3π 9) radians 10 10) - 34) 35) 3 36) 0 37) 2 1 38) - 2 39) - 3 3 40) - 2 8π radians 3 2 2 41) - 11) -36° 12) -700° 13) 3.39 radians 14) -145.53° 15) 126° 16) 105° π 17) 2 18) 1 2 42) - 1 2 43) 1 3 2 44) 45) 1 46) - 4π 3 2 3 3 47) 3 48) 0.3894 49) 0.9474 50) 0.6235 51) 4.9973 52) 1.0515 19) 17.45 inches 20) 6.28 inches 21) 128.9° 77 22) 2 23) 55 8 53) sin θ = 2 29 29 24) 4 7 7 54) csc θ = 85 9 25) 76° 26) 62° 27) 49° π 28) 12 55) 640.7 feet 56) (-∞, ∞) 57) [-1 to 1] 77 58) - 2 29) π 4 59) - 30) π 4 3 73 73 60) - 31) π 3 15 8 32) 2 3 3 33) - 61) amplitude is 4 period is 6π 7 62) amplitude is 8 3 2 period is 6 5 4 Answer Key Testname: MTH 113 TEST 1 PRACTICE SUMMER 2013 63) 64) π units to the left 4 68) 6 π units to the right 4 y 4 65) 2 y -2π 3 -π π 2π x -2 -4 -2π -π π 2π x -6 69) y -3 2 66) 1 y 3 -π -π 2 π 2 π 3π 2 2π 5π 2 3π π 2 π 3π 2 2π 5π 2 3π x -1 -π -π 2 π 2 π x -2 70) -3 y 2 67) y 1 3 -π -π 2 -1 -π 2 -π 4 π 4 π 2 x -2 -3 7 x Answer Key Testname: MTH 113 TEST 1 PRACTICE SUMMER 2013 71) y 8 6 4 2 -2π -π -2 π 2π x -4 -6 -8 72) π 3 73) π 2 74) 3π 4 75) π π 76) 6 77) π 4 78) 0 79) -1.06 80) 1.91 81) 0.84 π 82) 7 83) - π 7 84) 4 5 85) 8 89 89 8