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If A+B+C=90^(@) then (cos 2A+cos 2B+co...

If `A+B+C=90^(@)` then
`(cos 2A+cos 2B+cos 2C-1)/(sin A sin B sin C)=`

A

2

B

4

C

3

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-TRANSFORMATIONS AND INDENTITIES-PRACTIVE EXERCISE
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  19. If A+B+C=270^(@) then sin 2A+sin2B+sin2C=

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