Math, asked by atur1975, 9 months ago

find the value
of
tan 48°tan 23°tan 42° tan 67°

Answers

Answered by amitsnh

1

Answer:

1

Step-by-step explanation:

= sin48sin23sin42sin67/cos48cos23cos42cos67

= (2sin48sin42)(2sin23sin67)/(2cos48cos42)(2cos23cos67)

= (cos6 - cos90)(cos44 - cos90) / ((cos6 + cos90)(cos44 + cos90)

= cos6cos44/cos6cos44 ....(cos90 = 0)

=1

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