Cos 0.43 =cos (-0.43)

1 answer:

4 0

This is true because $cos(x)$ is an odd function meaning that if you plug in a negative value, you will still get the same answer if you plugged in the absolute value of that number.

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If I understood coorectly, you're looking for the fourth root of 81. This exercise can be solved by remembering that extracting the fourth root of a number is the same as raising that number to the power of 1/4.

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This is the correct answer because if you put the fractions into decimal form it is the only answer option that has both as non-terminating decimals. The rest all have at least one terminating decimal.

Hope that helps u!

Sorry its so late tho...

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