Given that cos A = 4/5, and A is an obtuse angle measured in radians, find

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Given that cos A = − 4/5, and A is an obtuse angle measured in radians, find the exact value of:

a. sin A

b. cos (π + A)

c. sin (π/3 + A)

d. tan (π/4 + A)

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

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Question Posted: Aug 11, 2023 07:12 AM

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Given that cos A = 4/5, and A is an obtuse angle measured in radians, find

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

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