Question

show that tan 48 tan 16 tan 42 tan 74 = 1

Answer 1

Check the above answer

Answer 2

Step-by-step explanation:

we know that L.H.S = tan 48 tan 16 tan 42  tan 74

=tan(90-42) .tan 16 .tan 42 .tan (90-16)

=cot 42 .tan 16 .tan 42 .cot 16

=1/tan 42. tan 16. tan 42. 1/tan 16

=1

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