Question

tan 48 tan 23 - tan 42 tan 67​

Answer 1

Answer:

We have tan 48 tan 23 - tan 42 tan 67 = 1

tan 48 ( tan 90 - 48 ) tan 23 tan ( 90 - 23 )

tan 48 cot 48 tan 23 cot 23

( tan 48 × 1/tan 48 ) × ( tan 23 × 1/tan23 )

1×1

=> 1

RHS

LHS = RHS

Therefore, Hence verified.

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