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3 years ago

7

Please help question in the picture

1 answer:

Natalka [10]3 years ago

5 0

Answer: use the Pythagorean theorem a2+b2=c2 substitute the numbers in

7 squared + 3 squared = c squared so 7x7=49 and 3x3=9 add 49 and 9 which equals square root of 58 since that is not a perfect square you take square root of 58 and you simplify and that gives you 7.62

Step-by-step explanation:

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1+cos2A/cos2A = tan2A/tanA prove LHS=RHS

son4ous [18]

$RTP: \frac{1 + cos(2A)}{cos(2A)} = \frac{tan(2A)}{tan(A)}$

$LHS = \frac{1 + cos(2A)}{cos(2A)}$
$= \frac{1 + \frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}{\frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}$
$= \frac{\frac{1 + tan^{2}(A) + 1 - tan^{2}(A)}{1 + tan^{2}(A)}}{\frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}$
$= \frac{2}{1 - tan^{2}(A)}$
$= \frac{2}{1 - tan^{2}(A)} \cdot \frac{tan(A)}{tan(A)}$
$= \frac{\frac{2tan(A)}{1 - tan^{2}(A)}}{tan(A)}$
$= \frac{tan(2A)}{tan(A)}$
$= RHS$ , as required.

3 0

4 years ago

An artist is deciding between two different triangular shapes to use for a sculpture. The first triangle has a base of 20 feet a

sdas [7]

The correct answer is c) 4ft

6 0

4 years ago

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Multiply. 3 7/8×1/2 Enter your answer as a mixed number in simplest form by filling in the boxes. $$ I NEED THIS ASAP

Mandarinka [93]

Answer:

1.9375

Step-by-step explanation:

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3 years ago

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Harper knows he is 50 yards from school. The map on his phone shows that the school is 3/4 inch from his current location. How f

yulyashka [42]

Answer:

Harper is 200 yards away from her home if the map shows 3 inches

Step-by-step explanation:

50 yards = 3/4 inch

3 inches = 3/1

3/1 x 4/4 = 12/4

12/4 = 3 inches

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6 0

3 years ago

Solve for m. 7/10=r-(-8/5)

Eddi Din [679]

Answer:

-9/10 =r

Step-by-step explanation:

7/10=r-(-8/5)

Subtracting a negative is like adding

7/10=r+(8/5)

Subtract 8/5 from each side

7/10 - 8/5=r+(8/5) - 8/5

7/10 - 8/5 = r

Get a common denominator

7/10 - 16/10 = r

-9/10 =r

3 0

4 years ago

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