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View History Bookmarks Develop Window Help edugen.wileyplus.com Quiz 3-SPOc-Plane Trigonometry WileyPLUS Young, Trigonometry, 3e Help I System Announcements (1 Unread) me: 06:37 PM/Remaining: 20 min ESOURCES Question 1 9 If COS = -7 and the terminal side of lies in quadrant III, find Give an exact answer. Enter \"NA\" if sin cannot be found. sin lts by Study MapleNet

Solution

cos theta = -9/7

base = 9

hypotenuse = 7

since base is greater than hypotenuse

so , sin theta cannot be found

2) csc (225 )

finding sin (225 ) = - sin ( 45 ) = - sqrt 2 / 2

csc ( 225 ) = 1/ sin 225

= -1 / sqrt 2 /2

= - 2 / sqrt 2

csc (225 ) = - sqrt 2

3)csc theta = sqrt 15 /2

sin theta = 1 / csc theta

= 1 / sqrt 15 /2

= 2 / sqrt 15

sin tehta = 2 sqrt 15 / 15