(sinbcosb-3)\(6cos^2b-sin^2b),если tgb=-2

Question

(sinbcosb-3)\(6cos^2b-sin^2b),если tgb=-2

Comments

where exactly angle b?

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просто надо вычислить

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I know but is angle tgb on area 2 or 4?

Answer 1

I hope this helps you

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