Question

(1+ sin theta) ( 1- sin theta)= 1 upon sec square theta​

Answer 1

(1+ sin●) × (1-sin●)

=(1)^2 - (sin●)^2

=1- sin^2●

=cos^2●

=1/sec^2●

I hope this will help u.

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Answer 2

Answer:

$(1 + \sin(x) )(1 - \sin(x) ) \\ = 1 - { \sin(x) }^{2} \\ = { \cos(x) }^{2} = \frac{1}{{ \sec(x) }^{2} }$

Hope it helped ❤