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Can someone please show me, step-by-step, how
cos(θ)sin(θ+φ)-sinθcos(θ+φ)
simplifies to sinφ?
I know I have to use trig identities, and I got to cos2θsinφ-sin2θcosφ but I'm not sure where to go from there.
Thanks
cos(θ)sin(θ+φ)-sinθcos(θ+φ)
simplifies to sinφ?
I know I have to use trig identities, and I got to cos2θsinφ-sin2θcosφ but I'm not sure where to go from there.
Thanks