2 years ago

1.) The following figures are congruent. What side corresponds to side CD?

Mathematics

1 answer:

cupoosta [38]2 years ago

7 0

Answer:

C Side ZX

Because ZX is a reflection of CD

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bagirrra123 [75]

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2 years ago

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How did he get this 1/2i ? I dont remember studying this definition in calc 1 neither calc 2!

Hitman42 [59]

The $i$ in the denominator is missing in the second expression. It should be

$\sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

This follows from

$e^{iat}=\cos at+i\sin at$
$e^{-iat}=\cos at-i\sin at$
$\implies e^{iat}-e^{-iat}=2i\sin at$
$\implies \sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$