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arindameducationusc
 one year ago
Without calculator,steps for finding cos inverse(8/208)?
arindameducationusc
 one year ago
Without calculator,steps for finding cos inverse(8/208)?

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amilapsn
 one year ago
Best ResponseYou've already chosen the best response.2\[\arccos{\frac{8}{208}}=\arccos{\frac{1}{26}}=\frac{\pi}{2}\arcsin{\frac{1}{26}}\approx \frac{\pi}{2}\frac{1}{26}\]because for small \(\theta\), \(\sin\theta=\theta\Rightarrow\arcsin\theta=\theta \)

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0Answer had to come in degrees which is 88 @amilapsn .. Please proceed again...

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0please do all in steps.... Till I get 88 degrees

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1Nice! @arindameducationusc are you saying you don't know how to convert \(\frac{\pi}{2}\frac{1}{26}\) from radians to degrees ?

amilapsn
 one year ago
Best ResponseYou've already chosen the best response.2\[\arccos{\frac{8}{208}}\approx\frac{\pi}{2}\frac{1}{26}=\left(\left(\frac{\pi}{2}\frac{1}{26}\right)\times \frac{180}{\pi}\right)^o\approx88^o\]

amilapsn
 one year ago
Best ResponseYou've already chosen the best response.2Are you ok @arindameducationusc ?

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0It should be (pi/21/26)*pi/180.... @amilapsn @ganeshie8

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0No, I got it....my bad..... silly mistakes do happen! LOL...!!!! I got it@amilapsn

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1whichever you're converting to, that must be on top : radians to degrees : 180/pi degrees to radians : pi/180

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0Thank you. one question @ganeshie8 why did we use pi/2arcsin(theota)?????

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0property? Send me a link about this property?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1familiar with this identity \(\arcsin(x)+\arccos(x)=\frac{\pi}{2}\) ?

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0o yes, got it...! thank you.....

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.1np :) you also need to know the small angle approximation of \(\sin\theta\) when \(\theta\) is small, we can replace \(\sin\theta \) by \(\theta\)
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