besania besania

12-06-2016
Mathematics

Answered

Find CosB, TanB, SinB.

Find CosB, TanB, SinB. class=

Verified Answer :

12-06-2016

Hello,

Theorem of Al'Kashi says:

12²=13²+5²-2135*cos b
==>cos b=5/13

sin b= √(1-(5/13)²)=12/13

tan b=(12/13)/(5/13)=12/5

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