what are approx values of sin and cos 5π/4
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cos(5π/4)=cos(π+π\4)= -cos(π/4)=-1/√2 answer
sin(5π/4)= sin(π+π/4)=sinπ/4=1/√2 answer
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sin(5π/4)= sin(π+π/4)=sinπ/4=1/√2 answer
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