Hello,the question i don't know is:2(sin3x)(cos3x). It needs me to simplify it: thank you!
L Leah5467 Junior Member Joined Feb 28, 2019 Messages 91 May 16, 2019 #1 Hello,the question i don't know is:2(sin3x)(cos3x). It needs me to simplify it: thank you!
topsquark Senior Member Joined Aug 27, 2012 Messages 2,365 May 16, 2019 #2 Leah5467 said: Hello,the question i don't know is:2(sin3x)(cos3x). It needs me to simplify it: View attachment 12143 thank you! Click to expand... Hint: Recall that sin(2x)=2 sin(x) cos(x)\displaystyle sin(2x) = 2~sin(x) ~ cos(x)sin(2x)=2 sin(x) cos(x). What would you use for x here? -Dan
Leah5467 said: Hello,the question i don't know is:2(sin3x)(cos3x). It needs me to simplify it: View attachment 12143 thank you! Click to expand... Hint: Recall that sin(2x)=2 sin(x) cos(x)\displaystyle sin(2x) = 2~sin(x) ~ cos(x)sin(2x)=2 sin(x) cos(x). What would you use for x here? -Dan
L Leah5467 Junior Member Joined Feb 28, 2019 Messages 91 May 16, 2019 #3 I see! Is the next step sin(2(3x))?
topsquark Senior Member Joined Aug 27, 2012 Messages 2,365 May 16, 2019 #4 Leah5467 said: I see! Is the next step sin(2(3x))? Click to expand... Yup! ? -Dan
