Question

If tan theta + sec theta is equal to L then prove that sec theta is equal to L square + 1 by 2L

Answer 1

I = tanФ + secФ

I - secФ = tanФ

l² + sec²Ф  - 2 l secФ = tan²Ф

                                = sec²Ф - 1

So secФ = (l² + 1) / 2l

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Answer 2

Answer:

Step-by-step explanation:

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