1.
Cot A-tan A = cos
COS 2A
Cot At tan
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Step-by-step explanation:
ANSWER
LHS cotA+tanA
=sinAcosA+cosAsinA
=sinAcosAcos2A+sin2A
=sinAcosA1{∵sin2x+cos2x=1}
=cosecAsecA
=RHS Hence prove
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