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3 years ago

Trigonometry

Mathematics

1 answer:

Mazyrski [523]3 years ago

3 0

Answer:

0.3491rad

Step-by-step explanation:

We are asked to convert 20° to radians.

#We know that 1° is equal to π/180 or 0.01745rad.

To convert any angle degrees to radians, we multiply it by π/180:

$=20\times\pi/180\\\\=0.3491 \ or \ \frac{\pi}{9}rad$

Hence, 20° converted to radians is 0.3491rad

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A triangle has one angle that is 70 degrees and another that is 75 degrees. What is the third angle value in degrees?

mote1985 [20]

Answer:

35 degrees is the third angle's value.

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3 years ago

Last month, customers at a gift shop bought 40 birthday cards,

Iteru [2.4K]

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Step-by-step explanation:

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3 years ago

Is -3 a natural number a whole number a integer a rational number or irrational number

BaLLatris [955]

Answer:

-3 is a rational integer.

Step-by-step explanation:

An integer is a superset of the whole numbers that includes the negated values as well as 0.

A rational number is simply anything that can be expressed as a fraction.

-3 is by these definitions, a negated 3, and any non fractional number can be expressed as a fraction.

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And -3 is also not an irrational number since it can be expressed as a fraction.

Thus, -3 is a rational integer.

Cheers.

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3 years ago

(-17+2) - (2 × 4 - 2)²

ra1l [238]

Answer:

-51

Step-by-step explanation:

-17+2 is -15

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4 0

3 years ago

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Plot the zeros of the polynomial y = x4 + 3x3 − 27x2 + 13x + 42

a_sh-v [17]

Answer:

See explanation

Step-by-step explanation:

Consider the polynomial $y=x^4+3x^3-27x^2+13x+42$ 4th power polynomial function has at most 4 zeros.

Integer zeros can be only among the divisors of 42:

$\pm1, \ \pm 2,\ \pm 3,\ \pm 6,\ \pm 7,\ \pm 14,\ \pm 21,\ \pm 42$

Check them:

$y(1)=1^4+3\cdot 1^3-27\cdot 1^2+13\cdot 1+42=1+3-27+13+42=32\neq 0\\ \\y(-1)=(-1)^4+3\cdot (-1)^3-27\cdot (-1)^2+13\cdot (-1)+42=1-3-27-13+42=0\\ \\y(2)=2^4+3\cdot 2^3-27\cdot 2^2+13\cdot 2+42=16+24-108+26+42=0\\ \\y(3)=3^4+3\cdot 3^3-27\cdot 3^2+13\cdot 3+42=81+81-243+39+42= 0\\ \\y(-7)=(-7)^4+3\cdot (-7)^3-27\cdot (-7)^2+13\cdot (-7)+42=2,401-1,029-1,323-91+42= 0$

Thus,

$y=(x+7)(x+1)(x-2)(x-3)$

Zeros are plotted in attached diagram.

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4 years ago

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