show that tan48 tan23 tan42 tan64
=1
sivaprasath:
tan48 tan23 tan42 tan64≠1
yes it is not 64 it is 67
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where is your question and how it's possible bro
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Answer:
Step-by-step explanation:
tan 48 tan23 tan42 tan67 = tan 48 tan23 tan[90-48] tan[90-23]
= tan 48 tan23 cot48 cot67
=tan48 cot48 tan23 cot23
=1x1
=1
in your question not 64 it is 67
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