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marsss
 one year ago
Best ResponseYou've already chosen the best response.1\[\frac{ \cos ^{5}x }{ 5 }+\frac{ \cos ^{7}x }{ 7 }+c\]

alfers101
 one year ago
Best ResponseYou've already chosen the best response.0how come? what case did you used? is it case 2?

marsss
 one year ago
Best ResponseYou've already chosen the best response.1bak reyiz, cos^2 x=1sin^2 x. biliyon mu bunu??

alfers101
 one year ago
Best ResponseYou've already chosen the best response.0what? im sorry i cant understant your language, could you speak in english please?

alfers101
 one year ago
Best ResponseYou've already chosen the best response.0can someone please help me? :(

Callisto
 one year ago
Best ResponseYou've already chosen the best response.2I think it's not like what marsss did there... \[∫ sin^4 xcos^2xdx\]\[=∫ sin^4 x(1sin^2x)dx\]\[=∫ sin^4xsin^6xdx\]\[=∫ (sin^2x)^2dx∫(sin^2x)^3dx\]\[=\frac{1}{4}∫ (1cos2x)^2dx\frac{1}{8}∫(1cos2x)^3dx\]\[=\frac{1}{4}∫ (12cos2x+cos^22x)dx\frac{1}{8}∫(13cos2x+3cos^22xcos^32x)dx\] Reduce the power of cosine into 1 using doucle angle formula, except for cos^3(2x). Good luck :
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