Use the given information to find (a) sin(s+t), (b) tan(s+t), and (c) the quadrant of s+t. cos s = - 12/13 and sin t = 4/5, s and t in quadrant ll.

Part a)    

Part b)

Part c) (s+t) lie on Quadrant IV

Step-by-step explanation:

[Part a) Find sin(s+t)

we know that

step 1

Find sin(s)

we have

substitute

---> is positive because s lie on II Quadrant

step 2

Find cos(t)

we have

substitute

is negative because t lie on II Quadrant

step 3

Find sin(s+t)

we have

substitute the values

Part b) Find tan(s+t)

we know that

tex]tan(s + t) = (tan(s) + tan(t))/(1 - tan(s)tan(t))[/tex]

we have

step 1

Find tan(s)

substitute

step 2

Find tan(t)

substitute

step 3

Find tan(s+t)

substitute the values

Part c) Quadrant of s+t

we know that

 ----> (s+t) could be in III or IV quadrant

----> (s+t) could be in III or IV quadrant

Find the value of cos(s+t)

we have

substitute

we have that

-----> (s+t) could be in I or IV quadrant

 ----> (s+t) could be in III or IV quadrant

----> (s+t) could be in III or IV quadrant

therefore

(s+t) lie on Quadrant IV

65°

step-by-step explanation:

the total measure of a triangle is 180 degrees. 62 + 53 is 115.

180 - 115 = 65

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints