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Verify: cos(pi-θ)=-cos(θ) cos((3pi/2)+θ)=sin(θ) Exact value of Tan2θ when tan(θ)=1/2 Exact value of cos2θ and sin2θ when sin(θ)=-5/13?

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  • Verify: cos(pi-θ)=-cos(θ) cos((3pi/2)+θ)=sin(θ) Exact value of Tan2θ when tan(θ)=1/2 Exact value of cos2θ and sin2θ when sin(θ)=-5/13?


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