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tan10^(@)" "tan15^(@)" "tan75^(@)" "tan8...

`tan10^(@)" "tan15^(@)" "tan75^(@)" "tan80^(@) `का मान है?

A

0

B

1

C

`-1`

D

`2`

लिखित उत्तर

Verified by Experts

The correct Answer is:
b
`tan10^(@)tan15^(@)tan75^(@)tan80^(@)rArr(tan10^(@) tan80^(@))(tan15^(@)tan75^(@))`
`rArr1xx1`
`rArr(tanA tanB=1"if" A+B=90^(@))`
`rArr1`
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