The secant is just the reciprocal of the cosine. Look at your unit circle: what common value of givesproblem 2: inverse sec(root 2)
for problem 2 I can't understand how to find out what the proper values are
Maybe this will make it more obvious:
Keep in mind that the range of is defined as (usually, but your textbook or instructor may have defined it another way).
Let Then the inverse, if it exists, satisfiesproblem 3 - find inverse of sin(x+2) -1
once again, boggled by how to do so