Find all the solutions on the interval [0,2π). sin[x+ π 4 ]+sin[x− π 4 ] = −1

Can you please also show all the steps on how you solved this I am having a hard time understanding this concept.

answer: d. $20

step-by-step explanation:

just took the test

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

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step-by-step explanation: