bumblebeetights bumblebeetights
  • 29-05-2018
  • Mathematics
contestada

Evalute [tex] sin^2(\frac{\pi}{12}) [/tex]

A. 1/4
B. 3/4
C. [tex] \frac{2-\sqrt3}{4}} [/tex]
D. [tex] \frac{2+\sqrt{3}}{4} [/tex]

PLEASE HELP ME.

Respuesta :

LammettHash
LammettHash LammettHash
  • 29-05-2018
Use the double angle identity:


[tex]\sin^2\dfrac\pi{12}=\dfrac{1-\cos\frac\pi6}2[/tex]


Then [tex]\cos\dfrac\pi6=\dfrac{\sqrt3}2[/tex], so you get


[tex]\sin^2\dfrac\pi{12}=\dfrac{2-\sqrt3}4[/tex]
Answer Link

Otras preguntas

How did the reformation change the political composition of europe?
Managerial economics refers to the application of microeconomics to business decision making. True False
What operating system feature enables the operating system to automatically detect newly installed hardware?
worth 30 points ! need the answer asap !!
Among the short-term obligations of Larsen Company as of December 31, the balance sheet date, are notes payable totaling $250,000 with the Dennison National Ban
You are 19 meters west of a stop sign when you start walking due east. Let d d represent the number of meters you have walked since you started walking due east
Lee y empareja la frase con la oración correcta. Read and match each phrase with the correct sentence. Match Term Definition Lidia limpia ________ en el baño.
What is the answer for 7x-(7+3x)
Which is greater 51/100 or .6
why do sikh men wear turbans?