Find cos using trig identities:
Therefore
Sub in tan x = 3, (Note that x is in 3rd quadrant, cos x < 0)
Finally, sub into Half-angle formula:(Note x/2 is in 2nd quadrant, tan x<0)
Answer:
The answer would be 35
Step-by-step explanation:
To solve correctly, we would need to follow PEMDAS
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
The first thing we see in this equation is Exponents, so we would fill in 3 for X, and so -3^2 is 9.
The next thing in the equation is Multiplication, so the next thing in the equation we would do is -4 times -11, which is 44.
The final thing in the equation is Addition, so we would add -9 add 44, which the answer would be 35.
Hope this helps!
Answer:
(Assuming they are both right triangles)
214.5 sq ft
Step-by-step explanation:
Area of a right triangle= leg×leg / 2
25×25 / 2 = 312.5
14×14 / 2 = 98
312.5-98= 214.5
Answer:
His speed in miles per minute
Step-by-step explanation:
21 = 3(3n - 5)
21 = 3(3n) - 3(5)
21 = 9n - 15
<u>+15 +15</u>
<u>36 </u>= <u>9n</u>
9 9
4 = n
