MATH 155 Midterm: MATH 155 NIU Exam 3
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C3=33: your signature on the back, no scratch paper outside of the exam is permitted, only a basic non-text capable, non-graphing calculator is permitted, graphing calculators, cell phones and pdas shall be stowed out of sight. If visible you will be deemed to be cheating and will receive. A zero score for the exam!: check that your exam contains exactly 20 problems. [1d] suppose that abc is a right triangle with c = If ac = 16 and bc = 12, then: (a) cos a = (b) cos a = (c) cos a = 4 (e) none of the above are true. [3d] assume that two angles of a triangle are. What is the third angle? (a) (b) (c) [4d] find the area of the sector of radius 3 in. and central angle 36 . R2 when the angle is in radians. ] (a) 72 in2 (b) 144 in2 (c)
