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I need help with exercise b.

I need help with exercise b.
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I need help with exercise b.

I need help with exercise b.-example-1
User Javrd
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\bf sin(-t)=\cfrac{5}{7}\implies -sin(t)=\cfrac{5}{7}\implies sin(t)=-\cfrac{5}{7}\\\\ -------------------------------\\\\ csc(t)\implies \cfrac{1}{sin(t)}\implies \cfrac{1}{-(5)/(7)}\implies \cfrac{(1)/(1)}{-(5)/(7)}\implies \cfrac{1}{1}\cdot -\cfrac{7}{5}\implies -\cfrac{7}{5}
User Jerahmeel Acebuche
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