Mastering Trigonometric Equations
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Questions and Answers

1 + tan² X

sec² X

sin² X + cos² X

1

sin(A±B)

sinAcosB ± cosAsinB

1 + cot² X

<p>csc² X</p> Signup and view all the answers

cos(A±B)

<p>cosAcosB -+ sinAsinB</p> Signup and view all the answers

tan(A±B) =

<p>(tanA ± tan B) / (1 -+ tanAtanB)</p> Signup and view all the answers

sin 2X

<p>2sinXcosX</p> Signup and view all the answers

cos 2X

<p>2cos²X - sin²X or 2cos²X - 1 or 1 - 2sin²X</p> Signup and view all the answers

tan 2X

<p>2tanX / (1- tan²X</p> Signup and view all the answers

sin X

<p>(e^iX - e^-iX) / 2i</p> Signup and view all the answers

cos X

<p>e^iX + e^-iX / 2</p> Signup and view all the answers

tan X

<p>[-i (e^iX - e^-iX)] / (e^iX + e^-iX)</p> Signup and view all the answers

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