Question

prove that cosec²72 - tan²18 = 1 pls​

Answer 1

Step-by-step explanation:

Cosec²72 = Sec²18 (Cosec theta = Sec (90-Theta))

1 + tan²18 = Sec²18 (1 + tan² theta = Sec² theta)

Putting these values in the given equation

1+tan²18-tan²18

= 1

Answer 2

Step-by-step explanation:

$\tan(18) = \tan(90 - 72) = \cot(72)$

We know that,

cosec²x - cot²x = 1

So,

$your \: answer \: is \: 1$