Question

prove that tan²A - 1/cos²A + 1 = 0 .please answer quickly. Its important. Don't spam. spams will be Reported.
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Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Prove that:

$\tan^2a - \frac{1}{ \cos^{2}a } + 1 = 0$

SOLUTION:

$\bold{LHS = \tan^2(a) - \frac{1}{ \cos^{2}(a) } + 1}$

$\bold{ = \tan^2(a) - \frac{1}{ \cos^{2}(a) } + 1}$

$\bold{ = \sec^2(a) - \frac{1}{ \cos^{2}(a) }}$

$\bold{ = ( \frac{1}{ \cos^{2} (a) } ) - \frac{1}{ \cos^{2}(a)} }$

$\bold{ = \frac{1 - 1}{ \cos {}^{2}(a)} }$

$\bold{ = \frac{0}{ \cos {}^{2}(a)} }$

$\bold{ = 0}$

=RHS

Hence Result is Proved