lizzymiller155
lizzymiller155 lizzymiller155
  • 20-03-2018
  • Mathematics
contestada

Need help!! Answers are
A. 0, 5pi/4
B. 7pi/6, 11pi/6
C. 3pi/4, 7pi/4
D. Pi/4, 5pi/4

Need help Answers are A 0 5pi4 B 7pi6 11pi6 C 3pi4 7pi4 D Pi4 5pi4 class=

Respuesta :

alkhalidisara
alkhalidisara alkhalidisara
  • 20-03-2018

1−cos2θ/cos2θ=−3/2⋅1/cosθ

2(1−cos2θ)= −3cos θ and cosθ≠0

2−2cos2θ+3cosθ=0 and cosθ≠0

2cos2θ−3cosθ−2=0 and cosθ≠0

cosθ=3±√9+16/4 and cosθ≠0

cosθ=3±5/4 and cosθ≠0

cosθ=−1/2;cosθ=2andcosθ≠0

so the answer is 

θ=2pie /3and θ=4π/ 3

Answer Link

Otras preguntas

B2 Cell division Summary questions 1 a What is the cell cycle? [1 mark] b Explain how and why you would expect the length of the cell cycle to vary: i between a
using the following image solve for x
Hello can you please help with the problem written below: A normally distributed variable has approximately 95% of values within ______ standard deviations of t
the crab that played with the sea how does repetition affect the narrators toneTHE ANSWER: B: repretion of the word lazy makes the tone humorous ​
I need more ideas I read a couple of mangas yesterday, and i regret reading one, but oh well, but i need more mangas to read lol..anyone have any suggestions???
who built the international space station
When preparing 1L of a 14% NaCl solution using a 20% NaCl solution and a 0.9% NaCl solution, how many mL of the 20% solution are needed?
which modernism Trends affected American Twentieth Century classical music ​
−−→AB=(xy) What values should x and y take?
Which gas is the most abundant in Earth's atmosphere? Carbon dioxide Helium Nitrogen Oxygen