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tan(45^(@)+ theta )*tan(45^(@)-theta)=...

`tan(45^(@)+ theta )*tan(45^(@)-theta)=`

A

0

B

1

C

`-1`

D

2

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 A ( TRIGONOMETRIC FUNCTIONS)
  1. cos^(2)(80^(@) + theta ) + sin^(2)(100^(@)- theta )=

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  2. sum(k=1)^3 cos^(2)((2k-1)(pi)/(12))=

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