Math, asked by aarjit16061397, 8 months ago

tan 20 * tan 70 = 1 prove

Answers

Answered by Anonymous

2

Answer:

tan20=cot70 so putting this in above

cot70×tan70 =1

Answered by Vedang2004

9

Step-by-step explanation:

LHS= tan 20× tan 70

=cot(90-20)×tan70

=cot70*tan70

=1/tan70 × tan70

=1

=RHS

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