Answer:
a = - 3 and b = 4
Step-by-step explanation:
Given
Simplify
= =
×
= 3
Thus expression can be written as
Multiply numerator/denominator by
noting that ×
= 2
=
=
Dividing each term on the numerator by 2
= 4 - 3
= - 3 + 4
with a = - 3 and b = 4
bearing in mind that the hypotenuse is never negative, since it's just a distance unit, so if an angle has a sine ratio of -(5/13) the negative must be the numerator, namely -5/13.
le's bear in mind that the sine is negative on both the III and IV Quadrants, so both angles are feasible for this sine and therefore, for the III Quadrant we'd have a negative cosine, and for the IV Quadrant we'd have a positive cosine.