How to solve this half angle identities

90° ⩽ x ⩽ 180° is another way of saying that the angle "x" is in the II Quadrant, where sine is positive whilst cosine is negative, as you can see in your Unit Circle.  We also know that csc(x) = 2, so

now, the angle "x/2" is half the arc of the angle "x", and since the angle "x" is in the II Quadrant, we can conclude the half of that arc will be on the I Quadrant, where sine and cosine and tangent are all positive.

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.

16.80 times .20= 3.36

step-by-step explanation: