Question

PROVE IT......................

Answer 1

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$\mathsf{See \ the \ attachment.}$

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Identities used :-

1. (a + b)(a - b) = a² - b²

2. 1 - sin² theta = cos² theta

3. 1/(cos theta) = sec theta


$\huge\mathbb{Hope \ this \ helps \ you.}$

Answer 2

$\underline{\bold{Answer:-}}$






Refer to the attachment above for your solution





Identities used in this Prove is given below :-


⏩ ( a + b )( a - b ) = a^2 - b^2



⏩ sin^2 theta + cos^2 theta = 1


i.e cos^2 theta = 1 - sin^2 theta




⏩ sec theta = 1 / cos theta







$\textbf{Hope it helps!}$