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3 years ago

What is the value of x? _________ *

Mathematics

1 answer:

Flura [38]3 years ago

7 0

Look at the picture.

The angle y° and 71° are Supplementary Angles. Therefore y° + 71° = 180°.

$y^o=180^o-71^o=109^o$

The sum of measures of these three angles of any triangle is invariably equal to 180°.

Therefore we have the equation:

$x^o+109^o+28^o=180^o\\\\x^o+137^o=180^o\ \ \ |-137^o\\\\x^o=43^o$

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Answer:

Step-by-step explanation:

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3 years ago

Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

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Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

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= $\frac{-10}{3}$

Since sin180=0 and cos 180=-1

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3 years ago

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mamaluj [8]

Answer:

Many options - 4/6 or 2/3 or 0.66

Step-by-step explanation:

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About 3 minutes (2.667 minutes)

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