without using trigonometry table evaluate tan12°tan38°tan52°tan60°tan78°.
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Answer:
√3
Step-by-step explanation:
tan(90-78) tan(90-52) tan52 tan60 tan78
as tan(90-x)=cot x
cot78 cot 52 tan52 tan 60 tan78
as cot 78*tan78=1and cot52*tan52=1
only tan 60 will left
which is equal to √3
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