Your question seems unclear
So pls check it then come back to us
The perfect squares are 25, 36, 49, 64, 81, 100, 121, 144, 169. You know a number is a perfect square when there is a whole number that can be multiplied by itself to get the number. Example: 25= 5x5
Hope that helps if you need a better explanation let me know.
Recall that
![\cos(90-x)^\circ=\sin x^\circ](https://tex.z-dn.net/?f=%5Ccos%2890-x%29%5E%5Ccirc%3D%5Csin%20x%5E%5Ccirc)
which tells you that
![\cos40^\circ=\cos(90-50)^\circ=\sin50^\circ](https://tex.z-dn.net/?f=%5Ccos40%5E%5Ccirc%3D%5Ccos%2890-50%29%5E%5Ccirc%3D%5Csin50%5E%5Ccirc)
, so in fact
![\cos40^\circ=\sin50^\circ=\dfrac{10}{15}](https://tex.z-dn.net/?f=%5Ccos40%5E%5Ccirc%3D%5Csin50%5E%5Ccirc%3D%5Cdfrac%7B10%7D%7B15%7D)
Attached is an image demonstrating why the identity is true.
Answer:
see explanation
Step-by-step explanation:
look at the explanation& answer photo