Question

Please help! Show that sin(2θ)−sin(2θ)=cos(2θ)−cos(θ)+1 simplifies to tan(θ)=1
Hence, solve sin(2θ)-sin(θ)=cos(2θ)-cos(θ)+1 for 0°≤θ≤360°

Answer 1

on the left side there is realy sin(2theta)-sin(2theta) just bc than this is equal zero same x-x=0 or you think same the right side sin(2theta) -sin(theta) ?
how is this right wrote please ?

Answer 2

than is so - to get tan(theta) just you need dividing the both sides by cos(theta) bc. hope you know that sin/cos = tan