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Show that -: (1) tan48 tan23 …

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Show that -: (1) tan48 tan23 tan42 tan67 = 1 Please Anyone give me answer of this question. ☺️☺️

Posted by Angel Audichya 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 6 months ago

tan 48° tan 23° tan 42° tan 67°=1

=tan(99°-42°) tan(90°-67°) tan42° tan 67°

=cot42° cot67° tan42° tan67°

=[cot42° tan42°] [cot67° tan67°]

=1×1

2Thank You

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