Geometry Refer to the figure. If |OA| = 1, show that: (a) Area OAC = 1/2 sin

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Geometry Refer to the figure. If |OA| = 1, show that: 

(a) Area ΔOAC = 1/2 sin α cos α

(b) Area ΔOCB = 1/2 |OB|2 sin β cos β 

(c) Area ΔOAB = 1/2 |OB| sin(α + β)

(d) |OB| =  cos α/cos β

(e) sin(α + β) = sin α cos β + cos α sin β

C A D

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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