Mathematics
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OpenStudy (anonymous):
What is the length of AB?
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OpenStudy (anonymous):
What is the length of AB?
OpenStudy (saifoo.khan):
We will use sin ratio to find the sides.
OpenStudy (anonymous):
I dont know how to do that actually
OpenStudy (saifoo.khan):
Wait we will use tan.
Tan theta = opposite/adjacent.
OpenStudy (saifoo.khan):
tan(30) = 10/adjacent.
adjacent = 10/tan(30)
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OpenStudy (anonymous):
For adjacent i got 17.3 ?
OpenStudy (saifoo.khan):
Yes.
OpenStudy (saifoo.khan):
AB = 17.3
OpenStudy (anonymous):
Thank you !!
OpenStudy (saifoo.khan):
Np
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OpenStudy (anonymous):
buuuut thats not one of my options lol
OpenStudy (saifoo.khan):
what are your options?
OpenStudy (anonymous):
27 cm
33 cm
34.32 cm
24.32 cm
OpenStudy (saifoo.khan):
Hey wait. we found AP.
OpenStudy (saifoo.khan):
Now we have to find PB
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OpenStudy (saifoo.khan):
And then add both
OpenStudy (anonymous):
arent they congruent so 34?
OpenStudy (saifoo.khan):
Lol. noo.
OpenStudy (anonymous):
nvm that was dumb
OpenStudy (saifoo.khan):
So for PB use tan again.
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OpenStudy (anonymous):
uhhuh ... explain
OpenStudy (saifoo.khan):
the ratio of tan is,
tan theta = OPPOSITE/ADJACENT.
agree?
OpenStudy (anonymous):
7?
OpenStudy (saifoo.khan):
Adjacent is 7.. correct.
OpenStudy (anonymous):
so 17?
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OpenStudy (anonymous):
i mean 41
OpenStudy (saifoo.khan):
we will take 45 as the angel to find the OPPOSITE side.
insert the values in ratio now.
OpenStudy (anonymous):
ok how do i do that . i just got lost
OpenStudy (saifoo.khan):
tan theta = OPPOSITE/ADJACENT.
you know theta = 45.
opposite side you have to find.
adjacent is 7.
OpenStudy (anonymous):
6.4...
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OpenStudy (anonymous):
oh i see what you mean sorry
OpenStudy (saifoo.khan):
Nope
OpenStudy (saifoo.khan):
No need to be sorry. ^_^
OpenStudy (anonymous):
so 45 = opposite/ 7 ?
OpenStudy (anonymous):
I really dont get this