Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

Question

anonymous · Answer

@micahm @MAli13chineta @morganchavez @MakaylaTracy @mikkel900 @partygirl @unicorn1234 @Tazmaniadevil @TheRaggedyDoctor @timothywhitaker @paki @Pompeii00 @PyroYolka @willsgirl16 @Destinymasha @DullJackel09 @Demonx341 @Donblue22 @quickstudent @sreekar369 @SithsAndGiggles @shinebrightlikeadimon @sweetburger @Kainui @kevindragonlord @ghuczek @gibbs @Gixxer_J @Nnesha @neko_of_hearts @nechirwan @Nannarzz @campbell_st @confluxepic @camerondoherty @Coolsector @ZnappyDooZ @zeig_101

micahm · Answer

https://www.google.com/search?q=Verify+the+identity.+cos+(x+-+y)+-+cos+(x+%2B+y)+%3D+2+sin+x+sin+y&rlz=1C1GGGE___US571US573&oq=Verify+the+identity.+cos+(x+-+y)+-+cos+(x+%2B+y)+%3D+2+sin+x+sin+y&aqs=chrome..69i57&sourceid=chrome&es_sm=122&ie=UTF-8

confluxepic · Answer

Didn't we tell you before not to mass tag. @sofiab716

confluxepic · Answer

Then 20 people will be helping at the same time.

anonymous · Answer

will u help me

confluxepic · Answer

I am sure 20 people will.

micahm · Answer

https://answers.yahoo.com/question/index?qid...