Question

help!! gold medal given!! use an identity to solve each equation on the interval [0,2pi]
2cos^2x+sinx-1=0

Answer 1

@Directrix

Answer 2

What is the identity that involes cos^2x. Look at the attached chart.

Answer 3

@kristinak

Answer 4

i'm so sorry my computer was acitng up

Answer 5

@Directrix

Answer 6

I'm still waiting for this answer: What is the identity that involes cos^2x. Look at the attached chart.

Answer 7

It's best to do these trig identities and equations one at the time. Finish the other one and then we can work on this one.

Answer 8

i did this one already, can you help me in another?