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## Homework Statement

I have two questions sin

^{2}x = 1/25 and this obviously becomes sinx= +-(1/5)

I also have cos

^{2}-1.5cosx-0.54 and cosx = (-3/10) and (9/5)

Now this is asking for me to solve for the x value in radians in the domain [0,2pi] and I have no idea how to solve these for exact values. Help would be appreciated.