Math, asked by hansvora0624, 1 year ago

Prove that : tan 55º = tan 350 + 2 tan 20°.

Answers

Answered by sandy1816

1

Step-by-step explanation:

tan55°=tan(35+20)

tan55=tan35+tan20/1-tan35tan20

tan35+tan20=tan55-tan55tan35tan20

tan35+tan20=tan55-tan(90-35)tan35tan20

tan35+tan20=tan55-cot35tan35tan20

tan35+tan20=tan55-tan20

tan55=tan35+2tan20

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