a. Use the expansion of sin (A B) to show that sin(/2 - ) = cos
Question:
a. Use the expansion of sin (A − B) to show that sin(π/2 - θ) = cos θ.
b. Use the expansion of cos (A − B) to show that cos(π/2 - θ) = sinθ.
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Related Book For
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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