MATH 155 Midterm: MATH 155 NIU Exam 3S
Document Summary
Zid: 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!: clearly show su cient work to justify your answers, check that your exam contains exactly 20 problems, each problem is worth 5 points. < a < and sin b = 1. [5a] find the exact value of cos(a + b): [6a] find the exact value of sin(a b): [9a] find all angles in the range 70 430 for which sin( ) = . [11a] solve cos2( ) + 8 cos( ) = 9. [12a] i want to construct a triangle with sides of length a, b, c opposite angles a, b, c respectively. I want a = 3, b = 5 and c = 7: either nd cos(b) or state that no such triangle exists .
