Question

cotA +cosecA -1/cotA-cosecA+1=1+cos A/sin​

Answer 1

☞ Used formulas :

• cot A = $\dfrac{cos\:A}{sin\:A}$

• cosec A = $\dfrac{1}{sin\:A}$

• (a + b) (a + b) = a² + b²

• (a + b) (a - b) = a² - b²

• sin² A + cos² A = 1

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Refer the Attachment

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Answer 2

Answer:

Refer to the attachment.

Step-by-step explanation:

Before answering the question, it is important to know that

1. cotA = cosA/sinA
2. cosecA = 1/sinA
3. (a+b)(a-b) = a² - b²
4. (a+b)² = a² + b² + 2ab
5. sin²A + cos²A = 1

Once these are known, ti becomes easy to answer the question.

Your solution is in the attachment.