Упростите: 1)1-cos2b/2sinb 2)1+cos4b/cos^2b-sin^2b 3)1+cos(pi+b)/sin(pi-b)

Question

Упростите:

1)1-cos2b/2sinb

2)1+cos4b/cos^2b-sin^2b

3)1+cos(pi+b)/sin(pi-b)

Answer 1

Решение на фото........

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Answer 2

I hope this helps you

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