Solving a Trig Equation: cos(3x)=-1

Solve cos3x = -1 for x in the domain from zero to 2pi radians using knowledge of the cosine function, substitution, and graphing.

[@Tinyanimalpaws]

This was really well explained. I applied this logic to a sin3x=-1 problem and it worked. Thanks to you I understand conceptually rather than just algebraically.

[@calefi0878]

Coincidentally, that same problem brought me here as well. This fellow really did a solid job explaining such.

[@evanthiaraymond7126]

i owe you my life for this video

[@gracem8227]

This was really helpful! thank you.

[@papermuffin3912]

Great help for A Level Maths! Ty

[@MATH-bq5oj]

GRACIAS MUY BIEN

[@duyphan811]

Thank you

[@kraltygrysku8668]

Shit I missed 3 classes, had no idea what I was doing in my hw/review for the upcoming test this Friday, and couldn't solve this problem. Thanks man, good video.

[@bowayson8809]

YOU ARE MY SAVIOR AMIGO I LOVE YOU

[@user-uk6tc7wj1q]

same here, love you Mr. Robinson

[@conphzhi]

Great fuckin video man thanks

[@jahlijah]

the chalkboard made me cringe haha. good explanation!

[@jesseconchas3151]

What if it were in degrees?

[@mathlegendno12]

Benvolio Smith If you want to turn radians into degrees, you want to multiply by 180 / pi

[@Crazybrothers-hh6rw]

You help me for the school