(cosθ+sinθ)=√2sin(θ+π/4)

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(cosθ+sinθ)=√2sin(θ+π/4)(cosθ+sinθ)=√2sin(θ+π/4)(cosθ+sinθ)=√2sin(θ+π/4)

(cosθ+sinθ)=√2sin(θ+π/4)
(cosθ+sinθ)=√2sin(θ+π/4)

(cosθ+sinθ)=√2sin(θ+π/4)