Answer:
see explanation
Step-by-step explanation:
using the identity
cos2a = 2cos²a - 1 , then
cos2a
= 2[ (a +
) ]² - 1
= 2 [ (a² +
+ 2) ] - 1
= (a² +
) + 1 - 1
= (a² +
) ← thus verified
Come
1 answer:
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Answer:
75%
Step-by-step explanation:
so there's 24 pieces and 6 are left so 18 were eaten which means
is you percentage because 18 divided by 24 is .75 then multiply by 100 to change it to percent so .75 times 100 is 75%