Question

find all answers for cos(tetha)+1=0

Answer 1

\[\theta=\pi, 3 \pi\]

Answer 2

steps ?

Answer 3

cos\[\cos \theta=-1\]

Answer 4

ik did that but arent you supposed to do cos inverse of 1 not -1 ???

Answer 5

\[\theta =\cos^{-1}( -1)\]

Answer 6

no u can

Answer 7

u can totally understand if u see the cos graph

Answer 8

thanks :D i got it but shouldnt be 2pi ?

Answer 9

no 2pi -pi=pi...nxt one is 2pi+pi=pi

Answer 10

u will get pi 2 tyms,bt u hv to mention it one tym

Answer 11

ok thanks