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Angle A is an obtuse angle with a sine of . What is the tangent of angle A?

Draw this angle in a unit circle. In which quadrant(s) is sine positive?

Find the missing side of the triangle with the Pythagorean Theorem.
Remember that in a unit circle some sides are negative.

Tangent is .

Your answer should be negative.

Unit Circle, with right triangle, line segment from center, to point in second quadrant, on circle, is hypotenuse, labeled 1, vertical leg, from point on circle, perpendicular to negative, x axis, labeled, 3 tenths.