Answer:
180-84-60= 36 degrees
Step-by-step explanation:
a triangle is composed of 3 angles up to 180 degrees 180-84 is 96 96-60 is 36.
Answer: x = - 8, x=- 2
Step-by-step explanation:
Factor to get (x+8)(x+2).
For solutions, make that equal to 0.
x+ 8 = 0
x+2 = 0
so x = - 8, x= - 2
Answer:
B. 24 ft.
Step-by-step explanation:
25 would be the hypotenuse of a triangle and 7 is a leg, so
7^2 + x^2 = 25^2
49 + x^2 = 625
x^2 = 576
x = 24 ft
That's basically any number that's larger than 3/4.
4/4
73/6
9/9
11/12
etc.
<span>Think of arcsin (-1/3) as an angle, and call it "theta." The the original problem becomes "find sec [ 2 theta ]"
1 1
which is the same as "find ------------------ " or --------------------------------------
cos[2 theta] (cos theta)^2 - (sin theta)^2
Recall that theta = the angle whose sine is -1/3. Thus, sin theta = -1/3 and cos theta = 2sqrt(2) / 3.
So we now have:
1
-------------------------------------------
2 sqrt(2) -1
[------------------- ]^ 2 - [ ------- ]^2
3 3
which boils down to:
1 1
----------------- = ---------------- = 9/7 (answer)
8 1 7/9
------ - --------
9 9
</span>