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Mathematics 8 Online
OpenStudy (anonymous):

sin 36 value??

OpenStudy (dls):

-0.99

OpenStudy (anonymous):

@DLS and the derivation of the value pls...

OpenStudy (dls):

Let 18=A...5A=90....2A+3A=90..2A=90-3A...sin(2A)=sin(90-3A)..sin(2A)=cos(3A)..put values of sin (2A) and cos(3A)get a quadratic and solve it..

OpenStudy (anonymous):

@DLS the value i asked is for sin36 not sin18!!! -_-

OpenStudy (dls):

Adjust karlo.

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