+- Southperry.net (https://www.southperry.net)
+-- Forum: Social (https://www.southperry.net/forumdisplay.php?fid=14)
+--- Forum: Rubik's Cube (https://www.southperry.net/forumdisplay.php?fid=58)
+--- Thread: Trig identity question. (/showthread.php?tid=36606)
Trig identity question. - Imagine - 2011-01-21
Verify that:
sec^4x * tan^2x=(tan^2x+tan^4x)sec^2x
I have a test tomorrow on stuff like this, and I can't prove/verify problems like these.
Trig identity question. - Russt - 2011-01-21
Apply the identity: sec^2 x = tan^2 x + 1.
Spoiler
Trig identity question. - shouri - 2011-01-21
Imagine Wrote:Verify that:hahahaha~
sex^4x * tan^2x=(tan^2x+tan^4x)sec^2x
I have a test tomorrow on stuff like this, and I can't prove/verify problems like these.
lols.
Gonna reiterate what russt said just in case the instructions don't quite click:
S^4 * T^2
=S^2 * (T^2 + 1) * T^2
now multiply the T^2 in to the (T^2 +1)
you get
S^2 * (T^4 + T^2)