Question

Aratati ca sin^2 30° + cos^2 45° = 3 supra 4

Answer 1

Sper ca ai inteles. E destul de simplu

Answer 2

[tex]sin^2~30=\ \textgreater \ (\frac{1}{2} )^2= \frac{1}{4} \\\\ cos^2~45= \ \textgreater \ (\frac{ \sqrt{2} }{2} )= \frac{2}{4} \\\\ sin^2~30+cos^2~45= \frac{1+2}{4} \\\\ sin^2~30+cos^2~45= \frac{3}{4} [/tex]