Question

Prove that tan71 + tan64/ 1-tan71 tan64 = -1.
solve it ​

Answer 1

Answer:  To prove: tan71 + tan64 / (  1-tan71 tan64 ) = -1

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Step-by-step explanation:

we know, 71 + 64 = 135

taking tan on both sides,

tan (71+64) = tan 135

or, tan71 + tan64 / (  1-tan71 tan64 ) = tan (90 + 45 )

or, tan71 + tan64 / (  1-tan71 tan64 ) = - tan 45 = -1

proved.  

Answer 2

Step-by-step explanation:

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