jasvor1
jasvor1
22-03-2017
Mathematics
contestada
What the answer of 6sin^2(X) + 2cos^2(x)=5
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Аноним
Аноним
22-03-2017
I hope this helps you
cos^2 (x)+sin^2(x)=1
cos^2 (x)=1-sin^2 (x)
6.sin^2 (x)+2 (1-sin^2 (x))=5
6sin^2 (x)+2-4sin^2 (x)=5
2sin^2 (x)=3
sin^2 (x)=3/2
cos^2 (x)+3/2=1
cos^2 (x)=1-3/2
cos^2 (x)= -1/3
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