+9 cos B= 0.2345
Solve for B
+37155 Clarification
IF B is in degrees then B = arcos (.2345) = 76.437 DEGREES
If B is in RADIANS then arccos(.2345) = 1.334092132482 RADIANS
The question does not say if B is in degrees or radians!!!
+37155 arc cos b = b = arc cos .2345 = acos(.2345) = 76.437848672801 degrees
+1904 Your answer of 76.437848672801 degrees is incorrect because 9.2345 is not in degrees but in radians. In order for 0.2345 to be in degrees instead of radians, it need to have the degree symbol: 0.2345°.
+1904 \(cos(B)=0.2345\)
\({cos}^{-1}(cos(B))={cos}^{-1}(0.2345)\)
\(B= 1.334092132482°\)
.+37155 Sorry....I disagree Gibson the .2345 is the cosine of B which is only a numerical value between 1 and -1 B MIGHT BE in DEGREES OR RADIANS.....the question does not state which...I used the more common degrees.
+1904 Read my post to you. You can disagree with me all you want, but you are wrong. No degree symbol next to the number mean radians, Degree symbol next to the number means degrees.
+1904 Also, to find out what B is, you cannot take an inverse cosine number in degrees and get an answer in degrees. You can only take a inverse cosine number in radians and get a number in degrees. The answer has to be in degrees.
+9 What about sin B = 0.7071 This is equal to 45degrees so why does cosB= 0.2345 have a much lower answer?
+37155 Cos starts at 1 for 0 degrees and goes to a value of zero at 90 degrees.
+37155 You are incorrect Gibson, sorry cos (76.437 DEGREES) = .2345 NOT .2345 degrees !!!
+37155 Clarification
IF B is in degrees then B = arcos (.2345) = 76.437 DEGREES
If B is in RADIANS then arccos(.2345) = 1.334092132482 RADIANS
The question does not say if B is in degrees or radians!!!
