SOLUTION: Find the value of each expression using the given information. 20) If sin x = 0.18, find cos (x - π/2)

Algebra ->  Trigonometry-basics -> SOLUTION: Find the value of each expression using the given information. 20) If sin x = 0.18, find cos (x - π/2)      Log On


   

Question 931313: Find the value of each expression using the given information.
20) If sin x = 0.18, find cos (x - π/2)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find the value of each expression using the given information.
20) If sin x = 0.18, find cos (x - π/2)
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cosx=√(1-sin^2(x))=√(1-.18^2)=√1-.0324=√.9676
cos(x-π/2)=cosxcos(π/2)+sinx*sin(π/2)=√.9676*0+0.18*1=0.18