if cosx = -1/2, find the value of cos 3x
Answers
Answered by
9
cosx=-1/2
x= 120 degree I. e( pie-60)
so cos3(pie-60)
=cos(3pie-180)
=cos(2pie)
=-1 is the ans please mark as Brainlist please
x= 120 degree I. e( pie-60)
so cos3(pie-60)
=cos(3pie-180)
=cos(2pie)
=-1 is the ans please mark as Brainlist please
ankitkumar55:
thank uh so much
Answered by
1
hope you like it...
thank you!
Attachments:
Similar questions