Question

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Answer 1

Answer:

Step-by-step explanation:

m=cosA-sinA and n=cosA+sinA

m²=cos²A+sin²Am²=1-2sinAcosA

n²=cos²A+sin²Am²=1+2sinAcosA

m²-n²=-4sinAcosA

m²+n²=2

m²-n² / m²-n²= -2sinAcosA

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Now 2 / tanA + cot A

2/ (sinA/cosA+cosA/sinA)

=2/ {(sin²A+cos²A)/sinAcosA)

=2sinAcosA/1

=2sinAcosA

So m²-n² / m²-n²= -2sinAcosA=-2/tanA +cotA

Answer 2

Answer:

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