Cosine Rulea² = b ² +c² - 2bc Cos A551² = 709.5² + 308² £os - 2 (8709.5) (308) (032/03/2024сAD =Cit -25cmfAгостBсIn the diagram above (not drawn to scale), AB = 20 cm, CD = 30cm₁DB= 25 cm and the angle DBC=t°1) Given that cos t° = ²25²x AB + BC = ACyil 20 + 24 = 446dCos (225) = 75.7°30cmthe length of AD to the nearest cm.ashow that sin BCD = 25.ii) Write down an expression for sin BED in terms of + and henceuse the cosine rule, or otherwise calculate

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A 20cm -25cm d 30cm a C In the diagram above (not drawn to scale), AB = 20 cm, CD= 30cm₁ DB-25 cm and the angle DBC=t° 1) Given that cos t°² = ²/25² the length use the cosine rule, or otherwise calculate of AD to the nearest cm. ii) Write down an expression Sor sin BED in terms of t and hence show that sin BED - 4

A 20cm -25cm d 30cm a C In the diagram above (not drawn to scale), AB = 20 cm, CD= 30cm₁ DB-25 cm and the angle DBC=t° 1) Given that cos t°² = ²/25² the length use the cosine rule, or otherwise calculate of AD to the nearest cm. ii) Write down an expression Sor sin BED in terms of t and hence show that sin BED - 4

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter62: Volumes Of Prisms And Cylinders

Section: Chapter Questions

Problem 38A: A copper casting is in the shape of a prism with an equilateral triangle base. The length of each...

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