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DedPeter [7]
3 years ago
5

Help please ASAP !!!

Mathematics
1 answer:
Arisa [49]3 years ago
3 0

For this case we have that by definition of trigonometric relations of rectangular triangles, that the sine of an angle is given by the opposite leg to the angle on the hypotenuse of the triangle. So:

Sin (45) = \frac {leg} {h}

Where h is the hypotenuse.

\frac {\sqrt {2}} {2} = \frac {leg} {h}

We cleared h:

h = \frac {2leg} {\sqrt {2}}

We rationalize:

h = \frac {2leg} {\sqrt {2}} * \frac {\sqrt {2}} {\sqrt {2}}\\h = \frac {2 \sqrt {2} * leg} {2}\\h = \sqrt {2} * leg

ANswer:

Option A

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The length of a rectangle is 1 ft less than twice the width, the area of the rectangle is 21 ft squared. What’s the length
guapka [62]

Answer:

The length of the rectangle is 6 feet

Step-by-step explanation:

Given as :

The length of rectangle is 1 feet less than twice the width

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∴ The length of rectangle = ( 2 w - 1 )  feet

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Or, The length of rectangle = 7 - 1 = 6 feet

Hence The length of the rectangle is 6 feet , Answer

3 0
3 years ago
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