prove that (cos(pi+x)cos(-x))/(sin(pi-x)cos((pi)/(2)+x))=cot^(2x
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Accordin to question
Prove
sin(π−x)cos(
2
π
+x)
cos(π+x)cos(−x)
=cot
2
x
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ANSWER
LHS =
sin(π−x)cos(
2
π
+x)
cos(π+x)cos(−x)
=
−sinxsinx
−cosxcosx
=cot
2
x
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