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2 years ago

Cos2a=cos2a-sin2a for all values of a. true or false

Mathematics

2 answers:

zzz [600]2 years ago

8 0

$\huge {\star }\: Answer$

The above equation is applicable for each and every value of a,

So, Correct option is A. True

_____________________________

$\mathrm{ \#TeeNForeveR}$

never [62]2 years ago

8 0

As stated above the answer is A. True

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4x+3x^2-8x+5x^2 I need help quick !!!

suter [353]

Answer:

8x^2 - 4x

Step-by-step explanation:

add like terms

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2 years ago

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Please help me with this math problem urgent

Luba_88 [7]

Answer:

11/5

Step-by-step explanation:

We can find the slope by

m = (y2-y1)/(x2-x1)

= (5 - -6)/(-4 - -9)

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2 years ago

The arch of a bridge forms the upper half of an ellipse. The arch is 6 meters above the 20-meter-wide river. Write an equation f

aksik [14]

Answer:

$\frac{x^2}{36} + \frac{y^2}{100} = 1$

Step-by-step explanation:

Required

The equation of the ellipse

This is calculated as:

$\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$

Where:

$b =6$ ---- height

$a = 0.5 * 20 =10$ --- width

So:

$\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$

$\frac{x^2}{6^2} + \frac{y^2}{10^2} = 1$

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2 years ago

Use the properties of geometric series to find the sum of the series. for what values of the variable does the series converge t

Oksi-84 [34.3K]

Answer:

- The sum of the series is given as

7/(1 + 7z)

- The series converges for (-1/7, 1/7)

Step-by-step explanation:

Given the geometric series:

7 - 14z + 28z² - 56z³ + ...

The common ratio r is given as

-14z/7 or 28z²/(-14z) or -56z³/(28z²) and so on

r = -7z

The sum of the series is given as

S = a/(1 - r)

Where a is the first term in the series.

S = 7/(1 -(-7z))

= 7/(1 + 7z)

The series converges for |-7z| < 1

That is for -1/7 < z < 1/7

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3 years ago

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Share 800 in the ratio 9:7.

bulgar [2K]

Answer:

The numerator '9's share is 450 and the denominator '7's share is 350.

Step-by-step explanation:

Step-1: Add the ratios:

9 + 7
16

Step-2: Divide 800 by the sum of the ratios:

800 ÷ 16
=> 50

Step-3: Multiply 50 with each ratio:

9 x 50 = 450
7 x 50 = 350

Hence, the numerator '9's share is 450 and the denominator '7's share is 350.

Hoped this helped.

$BrainiacUser1357$

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2 years ago

Cos2a=cos2a-sin2a for all values of a. true or false​

Cos2a=cos2a-sin2a for all values of a. true or false