Exam 6: Trigonometric Functions: Unit Circle Approach

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Find secθ\sec \theta , and cscθ\csc \theta given that cotθ=43\cot \theta = - \frac { 4 } { 3 } and secθ>0\sec \theta > 0

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Find the values of secθ\sec \theta and cotθ\cot \theta If the point (3,4)( - 3,4 ) Is on the terminal side of θ\theta

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A pilot sets out from an airport and heads in the direction N 3030 ^ { \circ } W, flying at a constant speed of 305305 mi/h. Forty-five minutes later the pilot makes a course and speed correction and now heads in the direction N 5050 ^ { \circ } W and reduces her speed to 175175 mi/h. Half an hour later, engine trouble forces her to make an emergency landing. Find the distance between the airport and the final landing point.

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Forty-five minutes after take off the pilot has traveled 228.75228.75 miles and 87.587.5
miles after her course correction. The distance between the airport and the final landing point can be found by the following: x2=(228.75)2+(87.5)22(228.75)(87.5)cos16097600x ^ { 2 } = ( 228.75 ) ^ { 2 } + ( 87.5 ) ^ { 2 } - 2 ( 228.75 ) ( 87.5 ) \cos 160 ^ { \circ } \approx 97600 \Rightarrow x97600312.41mix \approx \sqrt { 97600 } \approx 312.41 \mathrm { mi }

Find the exact value of the expression. tan(sin135)\tan \left( \sin ^ { - 1 } \frac { 3 } { 5 } \right)

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Find the length of an arc of a circle of radius 1212 ft if the arc subtends a central angle of 135135 ^ { \circ } .

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Find the area of a sector with central angle 5π/45 \pi / 4 in a circle with radius 0.50.5 m.

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If sinθ=32\sin \theta = \frac { \sqrt { 3 } } { 2 } for θ\theta In quadrant I, find tanθ+secθ\tan \theta + \sec \theta

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Find the measure of the central angle θ\theta in a circle of radius 8 ft if the angle is subtended by an arc of length 7 ft.

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Find sinθ\sin \theta and cosθ\cos \theta given that secθ=2\sec \theta = - 2 and tanθ>0\tan \theta > 0 .

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Rewrite the expression as an algebraic expression in x. sin(cos1x)\sin \left( \cos ^ { - 1 } x \right)

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A 86-ft tree casts a shadow that is 110 ft long. What is the angle of elevation of the sun? Round the answer to two decimal places.

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Find the reference angle for the given angles a) 202- 202 ^ { \circ } b) 19π6\frac { 19 \pi } { 6 }

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Rewrite the expression as an algebraic expression in x. sin(cos1x)\sin \left( \cos ^ { - 1 } x \right)

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Land on a small Caribbean island is valued at $45\$ 45 per square foot. What is the value of a triangular lot with sides of lengths 8080 Ft, 5050 Ft, and 120120 Ft?

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Solve the triangle. a=72.5,B=60,C=83a = 72.5 , \quad \angle B = 60 ^ { \circ } , \quad \angle C = 83 ^ { \circ }

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Find the indicated angle θ\theta .  Find the indicated angle  \theta  .

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Sketch the triangle given by A=23\angle A = 23 ^ { \circ } , B=78\angle B = 78 ^ { \circ } , c=88c = 88 , and solve it using the Law of Sines

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Find the side labeled x. Find the side labeled x.

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A 95t95 - \mathrm { t } tree casts a shadow that is 4545 Ft long. What is the angle of elevation of the sun?

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Find the exact value of the expression. csc(cos12425)\csc \left( \cos ^ { - 1 } \frac { 24 } { 25 } \right)

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