1.

Prove that tan Φ*tan(Φ+60) +tan(Φ+60)*tan(Φ-60)+tanΦ*tan(Φ-60)=-3

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ANSWER:

Step-by-step EXPLANATION:

BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST



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