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यदि sin7x=cos11x, है तो tan9x+cot9x का...

यदि `sin7x=cos11x`, है तो `tan9x+cot9x` का मान है?

A

1

B

2

C

3

D

4

लिखित उत्तर

Verified by Experts

The correct Answer is:
b

`sin7x=cos11x`
`7x+11x=90^(@)`
`18x=90^(@)`
`x=5^(@)`
`rArrtan9x+cot9x`
`rArrtan45^(@)+cot45^(@)`
`rArr1+1rArr2`
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