Solve. 121) To find the distance AB across a river, a distance BC of 643 m is laid off on one side of the river. It is found = that B 107.3° and C=14.2° Find AB. Use the parallelogram rule to find the magnitude of the resultant force for the two forces shown in the figure. Round to one decimal place. 122) Write the complex number in rectangular form. 123) + Write the complex number in trigonometric form r(cos θ i sin θ), with θ in the interval [0°, 360°). -15 + 20i 124) + Write the vector in the form ai bj. Round a and b to 3 decimal places if necessary. 125) = 1) tan θ 3; 2) 0.91 3) 80.21° 4) 5) 135° 6) III 7) Possible 8) Impossible 9) Possible 10) 11) -350° 12) 370° and 13) 14) = 15) b 7 16) 1 17) 0 18) 100° and 80° 19) ∞) 20) (-∞, 21) 4π 22) π to the right 4 23) 24) 25) [-5, 5] 26) 2 27) -109° + ∙ 28) n 360° - 29) 30)
Solve. 121) To find the distance AB across a river, a distance BC of 643 m is laid off on one side of the river. It is found that B = 107.3° and C=14.2° Find AB. Use the parallelogram rule to find the magnitude of the resultant force for the two forces shown in the figure. Round to one decimal place. 122) Write the complex number in rectangular form. 123) Write the complex number in trigonometric form r(cos θ + i sin θ), with θ in the interval [0°, 360°). 124) -15 + 20i Write the vector in the form ai + bj. Round a and b to 3 decimal places if necessary. 125) 1) tan θ = 3; 2) 0.91 3) 80.21° 4) 5) 135° 6) III 7) Possible 8) Impossible 9) Possible 10) 11) 12) 370° and -350° 13) 14) 15) b = 7 16) 1 17) 0 18) 100° and 80° 19) 20) (-∞, ∞) 21) 4π 22) π to the right 23) 4 24) 25) [-5, 5] 26) 2 27) 28) -109° + n ∙ 360° 29) - 30)
PreCalculus-Final-Exam-Review-Trig-Portion11.docx