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Find the value of r that will make the equation sin 31=cos r
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3 votes
Find the value of r that will make the equation sin 31=cos r

User Jitu Shinde
by
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1 Answer

5 votes
Use:


\sin(90^o-\alpha)=\cos\alpha


\sin31^o=\cos(90^o-31^o)=\cos59^o

therefore we have answer:

r = 59
User Elastep
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