1 Use a calculator to find an approximate value in radians o

1. Use a calculator to find an approximate value (in radians) of the expression rounded to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

cos¹(0.6)

2. The four cases in which we can solve a triangle are

ASA  SSA  SAS  SSS.

(a) In which of these cases can we use the Law of Sines to solve the triangle? (Select all that apply.)

ASA

SSA

SAS

SSS

(b) Which of the cases listed can lead to more than one solution (the ambiguous case)? (Select all that apply.)

ASA

SSA

SAS

SSS

3. In which of the following cases must the Law of Cosines be used to solve a triangle? (Select all that apply.)

ASA      SSS      SAS      AAS

Solution

1.cos^-1(-.6) = 126.86990

2.a. In SSA law of sine is used

b.SSA lead to more than one solution.

3.In SSS and SAS law of cosine is used