[SPLIT] verify sin 4x = 2sin^3 2x cos 2x + 2sin 2x cos^3 2x

[azdressagenut]

Thank you so much! I really appreciate everyones help! Now I am working on verifying trigonometric identities.

Directions: Verify that each trigonometric equation is an identity.

sin4x=2sin[sup:2j7n4mcl]3[/sup:2j7n4mcl]2xcos2x+2sin2xcos[sup:2j7n4mcl]3[/sup:2j7n4mcl]2x

tanxsin2x=2-2cos[sup:2j7n4mcl]2[/sup:2j7n4mcl]x

 

[Deleted member 4993]

Re: Fundamental Identities

Thank you so much! I really appreciate everyones help! Now I am working on verifying trigonometric identities.

Directions: Verify that each trigonometric equation is an identity.

sin4x=2sin[sup:3uiz0h78]3[/sup:3uiz0h78]2xcos2x+2sin2xcos[sup:3uiz0h78]3[/sup:3uiz0h78]2x

tanxsin2x=2-2cos[sup:3uiz0h78]2[/sup:3uiz0h78]x

Please start a new topic (thread) with a new set of problems.

Hint:

sin(2x) = 2 * sin(x) * cos(x)

Please show us your work, indicating exactly where you are stuck - so that we know where to begin to help you.