Question

How to solve this Please answer me back fast

Answer 1

HOLA

===================

$sec {}^{2} \: + \: cosec {}^{2} \geqslant \: 4 \\ \\ sec \: = \: \frac{1}{cos} = cos\\ \\ cosec \: = \: \frac{1}{sin} = \: sin \\ \\ cos {}^{2} + \: sin {}^{2} = \: 1 \\ \\ 1 \: \geqslant \: 4 \\ \\ so \: \: we \: prove \: sec {}^{2} + cosec {}^{2} \geqslant 4$

=========================

HOPE U UNDERSTAND ❤❤❤