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Tresset [83]
3 years ago
14

Find the exact value of tan 270º in simplest form with a rational denominator.

Mathematics
1 answer:
I am Lyosha [343]3 years ago
6 0

Answer:

the tangent of 270 is undefined

Step-by-step explanation:

Tan is sin/cos

270 is at (0,-1), so the cos is 0 and sin is -1

tan is -1/0  which is undefined

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Find the sum of 46 + 42 +38... +(-446) +(-450)
schepotkina [342]

The sum of the given sequence is -24846.

<u>Step-by-step explanation:</u>

The given Arithmetic sequence is 46 + 42 +38... +(-446) +(-450).

  • The first term of the sequence = 46
  • The last term of the sequence = -450
  • The common difference ⇒ 46 - 42 = 4

<u>To find the number of terms in the sequence :</u>

The formula used is n = (\frac{a_{n}-a_{1}} {d})+1

where,

  • n is the number of terms.
  • a_{n} is the late term which is -450.
  • a_{1} is the first term which is 46.
  • d is the common difference which is 4.

Therefore, n =(\frac{-450-46}{4}) +1

⇒ n = (\frac{-496}{4}) + 1

⇒ n = -124 + 1

⇒ n = -123

⇒ n = 123, since n cannot be negative.

∴ The number of terms, n = 123.

<u>To find the sum of the arithmetic progression :</u>

The formula used is S = \frac{n}{2}(a_{1} + a_{n} )

where,

  • S is the sum of the sequence.
  • a_{1} is the first term which is 46.
  • a_{n} is the late term which is -450.

Therefore, S = \frac{123}{2}(46+ (-450))

⇒ S = \frac{123}{2}(-404)

⇒ S = 123 \times -202

⇒ S = -24846

∴ The sum of the given sequence is -24846.

6 0
3 years ago
Simplify the expression using sum or difference identities cos(12)cos(-3)-sin(12)sin(-3)​
katen-ka-za [31]

Answer:

when you simplify the answer is -0.91113026

Step-by-step explanation:

8 0
4 years ago
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solniwko [45]

<em>b</em><em> </em>for <em>books</em><em> </em>read. b=1x + 1. the amount of months he's been in the club goes for x and +1 because he already read a book before he joined. if you do easy math, he's been there for 8 months because he read 9 books. i probably got the equation backwards but this works both ways imo.

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3 years ago
PLEASE HELP!!! GIVING 65 POINTS I NEED HELP NOW!!! !The table shows values for functions f(x) and g(x) .
Strike441 [17]

Answer: Given f ( x ) = 2x + 1 and g ( x ) = x2

+ 2x – 1 find ( f + g ) ( x ) and

( f + g ) ( 2 )

Solution

Step 1. Find ( f + g ) ( x )

Since ( f + g ) ( x ) = f ( x ) + g ( x ) then;

( f + g ) ( x ) = ( 2x + 1 ) + (x2

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= 2x + 1 + x2

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Step-by-step explanation:

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