Which expression gives the value of sin beta/b?
And here is the link to the problem: http://i7.tinypic.com/80v0h0l.gif
a. (sin 81°)/3.4
b. (sin beta)/3.4
c. (sin alpha)/3.4
d. 3.4 inches
2007-11-13 06:36:43 · 8 answers · asked by sillyboys_trucksare4girls 2 in Science & Mathematics ➔ Mathematics
a. (sin 81°)/3.4
2007-11-13 06:41:25 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
apply sine rule
a/sin(alpha) = b/sin(beta) = c/sin(81)
so b/sin(beta) = 3.4/sin(81) ( since c = 3.4)
take reciprocals of both sides
sin beta/b = sin 81/3.4
so option a
2007-11-13 06:47:58 · answer #2 · answered by mohanrao d 7 · 0⤊ 0⤋
a gives the value for sin beta/b
as
sin81/3.4=sin beta/b= sin alpha/a
so a is the answer
2007-11-13 07:02:22 · answer #3 · answered by Siva 5 · 0⤊ 0⤋
really, you take advantage of whichever is least confusing, reckoning on what's given. if you're given any attitude and the aspect opposite it (and in spite of else), imagine regulation of sines. if you're given all 3 aspects, or 2 aspects and the attitude between them, imagine regulation of cosines. regulation of sines frequently is composed of a lot less paintings, so oftentimes one makes use of regulation of cosines to locate sufficient training to end the challenge with the regulation of sines.
2016-10-24 04:15:13 · answer #4 · answered by butkovich 3 · 0⤊ 0⤋
a. because 81 is the angle opposite the side 3.4
2007-11-13 06:43:03 · answer #5 · answered by norman 7 · 0⤊ 0⤋
a. (sin81)/3.4
Sine Law just means that the sine of one angle over its opposite side is equal to the sine of any other angle over its opposite side.
2007-11-13 06:42:59 · answer #6 · answered by Anonymous · 0⤊ 0⤋
a
The law of Sines is:
Sin(A)/a = SIn(B)/b = SIn(C)/c
2007-11-13 06:42:05 · answer #7 · answered by Raymond 7 · 0⤊ 0⤋
a
2007-11-13 06:41:59 · answer #8 · answered by Anonymous · 0⤊ 0⤋