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The value of (sin 39^(@))/(cos 51^(@)) +...

The value of `(sin 39^(@))/(cos 51^(@)) + 2 tan 11^(@) tan 31^(@) tan 45^(@) tan 59^(@) tan 79^(@) - 3 (sin^(2) 21 ^(@) + sin^(2) 69^(@))` is

A

2

B

`-1`

C

1

D

0

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The correct Answer is:
D
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Find the value of (sin30^(@))/(cos^(2)45^(@))-tan^(2)60^(@)+3cos90^(@)+sin0^(@) .

The value of the ,, sin ^ (2) 37 ^ (@), sin ^ (2) 53 ^ (@), - tan ^ (2) 225 ^ (@) sin ^ (2) 53 ^ (@), -tan ^ (2) 135 ^ (@), sin ^ (2) 37 ^ (@) - tan ^ (2) 315 ^ (@), sin ^ (2) 37 ^ (@), sin ^ (2) 53 ^ (@)] | is

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KIRAN PUBLICATION-TRIGONOMETRY -TYPE - II
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  6. If 0^(@)ltthetalt90^(@) , the value of sintheta+costheta is

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