Question

The value of ( 1 - 2 tan45 ) ( 1+ tan 45 ) is

Answer 1

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Answer 2

Answer:

-4

Step-by-step explanation:

(1 - 2tan45°)×(1 + tan45°)

We know the value of tan45° is 1

Therefore,

[1 - (2×1)] × [ 1 +1 ]

= -2 × 2

= -4

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