3 years ago

Explain how integers and all whole numbers are rational numbers

Mathematics

1 answer:

katen-ka-za [31]3 years ago

3 0

If you need help in Math get the book " How to ace math in middle school it explains every lesson" Enjoy

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K + a = v + w, for a

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3 years ago

What basic trigonometric identity would you use to verify that sinx cosx tanx=1-cos^2x

andre [41]

Answer:

$sin^2x+cos^2x=1$ is used to prove the given equation.

Step-by-step explanation:

We have given an equation:

$sinx\cdot cosx\cdot tanx=1-cos^2x$

We will consider right hand side first

tan x can be written as:

$tanx=\frac{sinx}{cosx}$

So, on substituting tan x in the left hand side of the given equation we get:

$sinx\cdot cosx\cdot \frac{sinx}{cosx}$

Cancel common term from denominator and numerator which is cosx we get

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And we have an identity:

$sin^2x+cos^2x=1$

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Hence, right hand side is equal to $sin^2x$ .

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