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faltersainse [42]
2 years ago
10

Quiz

Mathematics
1 answer:
Maru [420]2 years ago
7 0
Need help to but can you mark Brainily
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Can someone explain to me why are we adding 2kpi when we are doing zeros for sin and cos, but adding kpi when doing zeros for tg
makvit [3.9K]

on the first exercise, you got a solution angle of π/18, that's a good solution for the I Quadrant only, however, on a circle, we have angles that go from 0 to 2π, however we can always keep on going around and continute to 2π + π/2 or 3π or 4π, or 115π/3 or 1,000,000π/18 and so on, and we're really just going around the circle many times over, getting a larger and larger angle, same circular motion.

π/18 on that exercise works for the I Quadrant, however if we continue and go around say 2π, we'll find that 2π/3 + π/18 is a coterminal angle with π/18, and thus that angle has also the same sine value.

π/18 + 2kπ/3 , where k = integer, is a way to say, all angles around the circle that look like this have the same sine, namely

π/18 + 2(1)π/3

π/18 + 2(2)π/3

π/18 + 2(3)π/3

π/18 + 2(5)π/3

π/18 + 2(99999999)π/3

.....

so using the "k" as some sequence multiplier, is a generic notational way to say, "all these angles".

you'll also find that "n" is used as well for the same notation, say for example

2π/3  + 2πn.

8 0
3 years ago
PLEASE HELP ME ASAP!!!
MatroZZZ [7]

You start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards.

10 cards every week = 10 w

Start with 5 baseball cards = + 5

At Most = ≥

3 0
2 years ago
30pts! Brainliest! Calculus 2!
masha68 [24]
Substitute 1/x with u
dx = -x^2 du
-1/4 integral of e^u•du
Apply exponential rule -(e^u)/4
Undo the substitution u is 1/x
Answer is (-(e^1/x)/4 ) + C
4 0
3 years ago
1. AQRS ~ ATUV; find x<br> 54<br> S<br> R<br> U<br> 36<br> 의<br> 24.<br> x+5<br> T
Dmitrij [34]

Step-by-step explanation:

x+5=36

or, x=36-5

or, x=31

The value of x=31

5 0
2 years ago
Bijan has agreed to run a half-marathon to raise money for charity. Each day before school, Bijan runs a 2.4-mile route around h
Slav-nsk [51]

Answer:

First one is (x+2.4)

Second one is 4(x+2.4)=14.8

Step-by-step explanation:

5 0
3 years ago
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