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Find the exact values ofcos (3pi/4radians) and sin (3pi/4 Radians)

User Hasvn
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1 Answer

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\cos(3\pi)/(4)=\cos\left(\pi-(\pi)/(4)\right)=-\cos(\pi)/(4)=-(\sqrt2)/(2)


\sin(3\pi)/(4)=\sin\left(\pi-(\pi)/(4)\right)=\sin(\pi)/(4)=(\sqrt2)/(3)

Look at the picture.


(\pi)/(2) \ \textless \ (3\pi)/(4) \ \textless \ \pi\\\\therefoere\\\\\cos(3\pi)/(4) \ \textless \ 0\ and\ \sin(3\pi)/(4) \ \textgreater \ 0

Find the exact values ofcos (3pi/4radians) and sin (3pi/4 Radians)-example-1
User EMX
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