From personal advice to professional guidance, IDNLearn.com has the answers you seek. Get comprehensive and trustworthy answers to all your questions from our knowledgeable community members.

write the given expression as the sine of an angle
sin40cos20+cos40sin20


Sagot :

It's [tex]sin(40+20)=sin60=\frac{\sqrt3}2[/tex]

Yo sup??

The given expression is in the form

sinAcosB+cosAsinB

we know that

sin(A+B)=sinAcosB+cosAsinB

therefore

sin40cos20+cos40sin20=sin(40+20)

=sin60

=√3/2

Hope this helps.