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Fiesta28 [93]
3 years ago
11

Can you help me with it please​

Mathematics
1 answer:
Kisachek [45]3 years ago
4 0

Answer:

\frac{20}{29}

Step-by-step explanation:

Equation of unit circle is:

x^2 + y^2 = 1

Plug y = \frac{-21}{29} in above equation.

x^2 + \bigg( \frac{-21}{29}\bigg)^2 = 1\\\\x^2 +  \frac{441}{841} = 1\\\\x^2   = 1-\frac{441}{841}\\\\x^2   = \frac{841-441}{841}\\\\x^2   = \frac{400}{841}\\\\x  =\pm\sqrt{ \frac{400}{841}}\\\\x  =\pm\frac{20}{29}\\\\

Since, point P is in the fourth quadrant.

Therefore, x - coordinate should be positive.

\huge \red {\boxed {\therefore x  =\frac{20}{29}}} \\\\

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