Given cos ? = - 4/7 (SEE IMAGE)a) Which 2 sides of a right-angled triangle have a relationship described by the cosine of an angle? b) Draw the triangles of ??? ? in the ‘CAST’ circle c) Show by calculation the exact value of ??? ? .. d) Use the info from the problem to prove the unit formula: ???2? + ???2? = 1 Scose = negativesin= positivenegativetancose negativesine = negativetan = positiveTAcose = positivesin = positive= positivetancose = positivesine = negativetan = negativeс Gitt4cos v7a) Hvilke 2 sider av en rettvinklet trekant har et forhold beskrevet ved cosinus til en vinkel?(2b)Tegn trekantene til cos vi 'CAST' sirkelen(Ec) Vis ved regning den eksakte verdien til sin v..(Ed) Bruk infoen fra oppgaven til å bevise enhetsformelen: sin²x + cos²x = 1(E

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Given cos ? = - 4/7 (SEE IMAGE) a) Which 2 sides of a right-angled triangle have a relationship described by the cosine of an angle? b) Draw the triangles of ??? ? in the ‘CAST’ circle c) Show by calculation the exact value of ??? ? .. d) Use the info from the problem to prove the unit formula: ???2? + ???2? = 1

Given cos ? = - 4/7 (SEE IMAGE) a) Which 2 sides of a right-angled triangle have a relationship described by the cosine of an angle? b) Draw the triangles of ??? ? in the ‘CAST’ circle c) Show by calculation the exact value of ??? ? .. d) Use the info from the problem to prove the unit formula: ???2? + ???2? = 1

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter2: Parallel Lines

Section2.3: Proving Lines Parallel

Problem 34E

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