Explanation:
First, we need to find the values of the sine and cosine of x knowing the value of tan x and x being in the 3rd quadrant. Since tan x = 5/12, using Pythagorean theorem, we know that

Note that both sine and cosine are negative because x is in the 3rd quadrant.
Recall the addition identities listed below:









Therefore, the expression reduces to



A right angle has one 90° angle, and the sum of the angles of any triangle is always equals 360°.
348 rocks because if you add 126 three times, or multiply it by 3, it equals 348. The numbers from the box you would use are 300, 30, and 18 then add them together
-3 -1 i believe is your answer
Answer:
2
(
y
2
+
17
)
Step-by-step explanation: