Notice that
11/12 = 1/6 + 3/4
so that
tan(11π/12) = tan(π/6 + 3π/4)
Then recalling that
sin(x + y) = sin(x) cos(y) + cos(x) sin(y)
cos(x + y) = cos(x) cos(y) - sin(x) sin(y)
⇒ tan(x + y) = (tan(x) + tan(y))/(1 - tan(x) tan(y))
it follows that
tan(11π/12) = (tan(π/6) + tan(3π/4))/(1 - tan(π/6) tan(3π/4))
tan(11π/12) = (1/√3 - 1)/(1 + 1/√3)
tan(11π/12) = (1 - √3)/(√3 + 1)
tan(11π/12) = - (√3 - 1)²/((√3 + 1) (√3 - 1))
tan(11π/12) = - (4 - 2√3)/2
tan(11π/12) = - (2 - √3) … … … [A]
Answer:
Step-by-step explanation:
To find the distance between any two points, we can use the distance formula.
The distance formula is:
Let (2,8) be x₁ and y₁ and let (7,7) be x₂ and y₂. Thus:
Simplify:
Square:
Add:
And that's our answer :)
Step-by-step explanation:
I think it would be c if not D
Answer:
13
Step-by-step explanation:
Answer: multiple them all together or add them
Step-by-step explanation:
