Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function.
Could someone explain how to get the answer as well please.
trig - Henry, Monday, September 5, 2011 at 4:13pm
To limit the results to only one answer, the range must be limited to a
value between 0 and 180 degrees:
0 < A < 180.
secA = 1/cosA = -2,
cosA = -1/2,
A = 120 deg.
secA = 1/cosA = -sqrt2,
cosA = -1/sqrt2,
A = 135 deg.
cosA = -(sqrt3)/2,
A = 150 deg.
tanA = -sqrt3,
A = -60 deg.,CW = -60 + 180 = 120 deg.