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The value of ( sin 43 ^(@))/( cos 47 ^(@...

The value of `( sin 43 ^(@))/( cos 47 ^(@)) + ( cos 19 ^(@))/( sin 71 ^(@)) - 8 cos ^(2) 60 ^(@)` is
`( sin 43 ^(@))/( cos 47 ^(@)) + ( cos 19 ^(@))/( sin 71 ^(@)) - 8 cos ^(2) 60 ^(@)` का मान बताइए:

A

0

B

1

C

2

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
A
`( sin 43 ^(@))/( cos 47 ^(@)) + ( cos 19 ^(@))/( sin 71 ^(@)) - 8 cos ^(2) 60 ^(@)`
`= ( sin 43 ^(@) )/( sin 43 ^(@)) + ( cos 19 ^(@))/( cos 19 ^(@) ) - ((1)/(2)) ^(2)`
` = 1 + 1 - ( 8 xx 1 )/(4) = 0`
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