Question

prove that (1 - cos^2 A) cosec^2 A = 1​

Answer 1

$\huge\bf\underline\red {ANSWER:-}$

• The key difference between biosphere and lithosphere is that the biosphere is a part of the crust and atmosphere that support living matter while the lithosphere is the solid shell of the Earth that includes the crust and part of the uppermost mantle.

yeh lo answer ...

Answer 2

Identity : sin 2A+cos 2 A=1

LHS =(1−cos 2 A)cosec 2 A

=sin 2 A× 1 ÷ sin 2 A

=1

=RHS

Hence proved

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