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Q.

tan69°+tan66°1tan69°tan66°=

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a

1

b

0

c

3

d

1

answer is C.

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Detailed Solution

tan69°+tan66°1tan69°tan66°

[tan(A+B)=tanA+tanB1tanAtanB]

=tan(69°+66°)

=tan(135°)

=tan(180°45°)

=tan45°

=1

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