Math, asked by RoshanKumar729, 9 months ago

the value of cos 20.sin70- sin20.cos70

Answers

Answered by DMNS

10

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$\tt{cos 20 = sin ( 90 - 20 ) }$
$\tt{cos 20 = sin 70}$

Replace using above we get ,

$\tt{sin^2 70 }$ - $\tt{sin^2 70 }$
$\tt{\pink{Answer = 0 }}$

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