Question

prove that
sec A / tan A + cot A = sinA​

Answer 1

LHS cotA+tanA

=

sinA

cosA

+

cosA

sinA

=

sinAcosA

cos

2

A+sin

2

A

=

sinAcosA

1

{∵sin

2

x+cos

2

x=1}

=cosecAsecA

=RHS Hence proved

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