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alexandr1967 [171]
3 years ago
12

PLEASE HELP WITH STEPS 25 POINTS!!!! Simplify

Mathematics
1 answer:
valentinak56 [21]3 years ago
5 0

Answer:

  • - 1 - sin α

Step-by-step explanation:

<u>Use identity:</u>

  • sin² α + cos² α = 1 ⇒ cos² α = 1 - sin² α = (1 + sin α)(1 - sin α)

<u>Substitute this into given expression and simplify:</u>

  • cos² α / (sin α - 1) =
  • (1 + sin α)(1 - sin α) / (sin α - 1) =
  • - (1 + sin α) =
  • - 1 - sin α
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the first and last term arithmetic sequence are 9 and 165 respectively.if the sum of all the terms of the arithmetic sequence is
diamong [38]

Answer:

  • 40 terms

Step-by-step explanation:

<u>Sum of n terms formula:</u>

  • Sn = 1/2n(a1 + an)

<u>Solving for n</u>

  • 3480 = 1/2n(9 + 165)
  • 3480 = 87n
  • n = 3480/87
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3 0
3 years ago
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Is the line through points P(2, –5) and Q(–5, –1) parallel to the line through points R(5, 4) and S(–2, 5)? Explain.
Irina-Kira [14]

Answer:

the answer is No

Step-by-step explanation:

Since the first line has a slope of -4/7 and the other line has a slope of -1/7. This can be shown in point slope form y-y1=m(x-x1) where m=∆y/∆x.

Through points P and Q, the point slope is represented as -1-(-5)=m(-5-2) ; 4 = -7m ; m = 4/-7. The next two points R and S can be shown in point slope as 5-4=m(-2-5) ; 1 = -7m ; m =1/-7. With the fact that parallel lines must have equal slopes, these two lines cannot be parallel because -4/7≠-1/7

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3 years ago
What is a divisor in math
Fittoniya [83]
The Divisor Is The Number That You Are Dividing With. Example:
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What is the percent of the shaded portion of the
AVprozaik [17]
IT IS 80 PLS MARK MEH BRALIEST:):):):):):):): also I did the this
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PLEASE URGENTLY ANSWER THESE 2 QUESTIONS, I WILL PROVIDE MORE POINTS AND CROWN YOU BRAINLIEST IF YOU DO!!!
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Answer:

1. I would think it would be a appropriate to use a normal model to figure this out because sometimes when you are using stuff online you can get the same number like 20 times in a row, whereas, if you use a real dice, you most likely won't roll the same number 20 times.

2. { sorry two doesn't make sense }

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2 years ago
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