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Using the Identity sint=cos(tπ2)\sin t=\cos \left(t-\frac{\pi}{2}\right) Find an Angle θ\theta Such That sin(3π4)=cosθ\sin \left(\frac{3 \pi}{4}\right)=\cos \theta

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Using the identity sint=cos(tπ2)\sin t=\cos \left(t-\frac{\pi}{2}\right) find an angle θ\theta such that sin(3π4)=cosθ\sin \left(\frac{3 \pi}{4}\right)=\cos \theta .

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