trig question, IM DESPERATE SOMEONE PLEASE HELP ME
prove: sinΘ - sinΘ * cos^2Θ= sin^3Θ
please show work, thank you so much in advance

Question

trig question, IM DESPERATE SOMEONE PLEASE HELP ME
prove: sinΘ - sinΘ * cos^2Θ= sin^3Θ 
please show work, thank you so much in advance

solomonzelman · Answer

$\large\color{red}{ \rm sinΘ - sinΘ \times cos^2Θ= sin^3Θ }$
$\large\color{red}{ \rm sinΘ (1 - cos^2Θ~)~=(~ sin^2Θ~) ~sinΘ}$

solomonzelman · Answer

Can you finish the problem ?

anonymous · Answer

sadly I don't know how to do these problems at all, when it comes to trig I'm clueless. but if you finish it for me I will give you a medal and be so thankful :c

solomonzelman · Answer

I don't really care about the medal, because my problem solving score is 99 anyway:)        

` 1)  Cancel  sinΘ  on both sides                                  `
` 2)  Add  cos²Θ  to both sides                                     `
` 3)  Do you get an identity of  sin²Θ + cos²Θ = 1     ? `

anonymous · Answer

wow you're amazingly smart but I have no idea :(((