If (sin A)^10 + (cos A)^10 = 1/5 find (sin A)^8 + (cos A)^8

[juandiaz]

I’m not sure my answer is 7/25

I start (sin A)^2 + (cos A)^2 = 1

 

[BigBeachBanana]

That is what I got as well.

 

[juandiaz]

That is what I got as well.

Thank you.