Question

cotA - tanA=2 cosA-1/sinA*cosA​

Answer 1

COT A - TAN A= COS A/SIN A- SIN A /COS A

=COS²-SIN²A/SIN A COS A

=COS²A-(1-COS²A)/SIN A COS A

=COS²A-1+COS²A/SIN A COS A

=2COS²A - 1/ SIN A COS A

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