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CBSE Class 11-science Answered

cos(90+x)=sinx,,how
Asked by ghoshshawata62 | 04 Mar, 2024, 08:16: PM
answered-by-expert Expert Answer

cos(90-x)=sin(x)

sin x = AB/AC

cos (90-x) = AB/AC

Hence,

cos(90-x)=sin(x)

Now,

cos(90+x)= cos(180–90+x)

=cos[180–(90-x)]

=-cos(90-x)

=-sin x

 

Answered by Arun | 05 Mar, 2024, 09:59: AM
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