1. ΔXYZ is right angled at Y. If $$sinX = \frac{4}{5}$$, then what is the value of $$cos Z$$ ?
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By: anil on 05 May 2019 03.00 pm
Given : $$sin X$$ = $$frac{4}{5}$$ Also, $$sin X=frac{YZ}{XZ}=frac{4}{5}$$ Let YZ = 4 cm and XZ = 5 cm To find : $$cos Z=frac{YZ}{XZ}$$
= $$frac{4}{5}$$ => Ans - (C)
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= $$frac{4}{5}$$ => Ans - (C)