Question

1+cos A / 1-cos A =(cosec A + cot A ) ²​

Answer 1

Answer:

1+cosA/1-cosA=(cosecA+cotA)²

Step-by-step explanation:

• (1+cosA)(1+cosA)/(1-cosA)(1+cosA)
• (1+cosA)²/1-cos²A
• 1+cos²A+2cosA/sin²A
• cosec²A+cot²A+2cosecAcotA
• (cosecA+cotA)²{proved}
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