Which expression is equal to –1? cot StartFraction pi Over 4 EndFraction sin StartFraction pi over 2 EndFraction sin StartFraction 3 pi Over 2 EndFraction tan StartFraction 5 pi Over 4 EndFraction

Given:

The four expression in the options.

To find:

Which expression is equal to –1.

Solution:

In option A,

In option B,

In option C,

In option D,

Therefore, the correct option is C.

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

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