MATH 1321 Midterm: MATH 1321 TTU Exam 3
31 Jan 2019
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Trigonometry practice exam 3 chapters 6 7. Exact means answer must be in terms of whole #"s, fractions, and/or radicals not calculator answers! Problems 6,7: the opposite side of an upper-case letter angle is the corresponding lower-case letter (i. e. for triangle def, side "d " is opposite angle d, side "e" is opposite angle e, & side "f" is opposite angle f) Problems 6,7,10: be sure to use significant figures in the final answers. Problems (10 points per entire problem): using calculator, find (to 4 decimal places) : a) arccos( 0. 4115) b) arccsc( 7. 2865, find exactly: a) cos 2 arctan 2 b) tan 2 arcsin. What is the angle the incline makes with the horizontal: a ship leaves port on a bearing of 110. 0 , traveling 8. 80 mi. It then turns and sails 2. 40 mi on a bearing of n 120. 0 w. Bonus questions: (b1) normalize vector u from problem 8.
