Evaluate the expression given cos a=4/5 for 0<a<pi/2 and sin b=-15/17 for 3pi/2<b<2pi. SHOW WORK 1.sin(a+b)
answer must equal -36/85

2.cos(a-b)
answer must equal -13/85

3.tan(a+b)
answer must equal -36/77

4.tan(a-b)
answer must equal -84/13

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

x=half

step-by-step explanation:

3,750 deer

step-by-step explanation:

1,500 is 15 times larger than 100

lets make 250 15 times larger.

3750 deer