If tan200 =λ, then tan1600 -tan11001+(tan1600)(tan1100)=

# If  then

1. A

$\frac{1+{\mathrm{\lambda }}^{2}}{2\mathrm{\lambda }}$

2. B

$\frac{1+{\mathrm{\lambda }}^{2}}{\mathrm{\lambda }}$

3. C

$\frac{1-{\mathrm{\lambda }}^{2}}{\mathrm{\lambda }}$

4. D

$\frac{1-{\mathrm{\lambda }}^{2}}{2\mathrm{\lambda }}$

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### Solution:

Give

Consider the expression

use the allied angles concept

and

Hence,

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