Question

Show that tan^2 – 1/cos^2 = –1.

Answer 1

Answer:

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Answer 2

Answer:

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Step-by-step explanation:

tan^2-1/cos^2+1=0

Here, I am using "A" instead of theta.

We know the trigonometric identity:

tan^A+1=sec^

and

1/cos A= sec A

Now,

LHS=tan^A-1/Cos^A+1

=(1+tab^A)- 1/cos^A

= Sec^A -sec^A

=0