Math, asked by snapeseverous3, 1 month ago

prove that
tan 80º = tan 10° + 2 tan 70°

Answers

Answered by ItzMeMukku

1

Step-by-step explanation:

Refer the attachment ❤️♥️

Attachments:

Answered by balaji99943

1

Answer:

80=10+70

Taking tangent of both sides,

tan80=tan(10+70)

⇒tan80 =

1−tan10.tan70

tan10+tan70

⇒tan80−tan80.tan10.tan70=tan10+tan70 (Since, tan80.tan10 = cot10.tan10 = 1)

⇒tan80−tan70=tan10+tan70

⇒tan80=tan10+2tan70

Hence Proved.

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