how 300/sin(120+Θ) become 300/cos(30+Θ)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 20E
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how 300/sin(120+Θ) become 300/cos(30+Θ)?

given diagramn
By rearrangng into
R
300KN
lami's thedrem of
toices
from lami's the rem
F- 205KN
R
F, = 205
Sin 150 .
300
R.
300
150
Sin (120+0)
Sin(90 -8)
(90-8)
20+0)
300
205
CH(30+0)
Sin(90+60)
F, s205
Cos (30+0) =
205
O = 1297°
Transcribed Image Text:given diagramn By rearrangng into R 300KN lami's thedrem of toices from lami's the rem F- 205KN R F, = 205 Sin 150 . 300 R. 300 150 Sin (120+0) Sin(90 -8) (90-8) 20+0) 300 205 CH(30+0) Sin(90+60) F, s205 Cos (30+0) = 205 O = 1297°
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