tan20.tan35.tan45.tan55.tan70=1
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tan70= tan(90-20)=cot20
tan55=tan(90-35)=cot35
=tan20.tan35.tan45.cot35cot20
=(tan20)(cot20)(tan35)(cot35)(tan45)
=(1)(1)(1)
=1
tan55=tan(90-35)=cot35
=tan20.tan35.tan45.cot35cot20
=(tan20)(cot20)(tan35)(cot35)(tan45)
=(1)(1)(1)
=1
Answered by
5
Hope this may help u.........
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tanisha50:
thanks for the brainliest
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