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sergeinik [125]

3 years ago

14

COS2A+ cos2 A cot2A =cot 2 A

2 answers:

user100 [1]3 years ago

7 0

9514 1404 393

Explanation:

This is an identity.

cos²(A) +cos²(A)cot²(A) = cot²(A)

Transforming the left side, we have ...

= cos²(A)(1 +cot²(A))

= cos²(A)csc²(A)

= (cos(A)/sin(A))²

= cot²(A)

Kryger [21]3 years ago

6 0

Answer:

a= (π/4) + (kπ/2)

Step-by-step explanation:

I have attached the explanation above. hopefully this will help

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