DRChancellor DRChancellor

19-03-2017
Mathematics

contestada

single equation: if sin B = -12/13, Π<-B<3π/2 what is the answer for sin 2B or sin B/2

Respuesta :

TheHero TheHero

27-03-2017

sin2B = 2sinBCosB (double angle formula)

sin(B/2) = 1/2 - 1/2 Cos(B)

Pi to 3pi/2 -> 3rd quadrant

cosB-> negative , sinB negative

CosB = -5/13

sin2B = 2 * -5/13 * -12/13 = 120/169

sinB/2 = 1/2 - 1/2 * * -5/13 = 9/13

Answer Link

Otras preguntas

develop a logical argument for any one reform you think was necessary during the industrial era. (3-5 sentences)

How does the impact of India's indepence movement compare with that of the arab-israeli conflict?

7. What is the most likely meaning of the word humanities? A. subjects related to science B. subjects related to culture C. subjects related to math

50% of the tickets sold at a water park were child tickets. If the park sold 44 tickets in all, how many child tickets did it sell?

WBC increased by 1400 in just 2 days.when I tested my blood I found that the number of WBC were 10500 and again after two days I tested and I found 11900 WBC?is

Need help solving this math problems

Nmms no entiendo nd de acá xd

Solve for X (3x – 47) (2X + 8) O X= 56 O X= 55 O X= 59 O X = 45

Can you think of any circumstances in which using a table might not be an efficient or accurate strategy for finding points of intersection?

pls help thanks for the help