Question

2tan 45⁰ - 2cos 45⁰ sin 45⁰ = ?​

Answer 1

$= 2 \tan45⁰ - 2 \cos45⁰ \sin45⁰ \\ = 2 \times 1 - 2 \times \frac{1}{ \sqrt{2} } \times \frac{1}{ \sqrt{2} } \\ = 2 - \frac{2}{ \sqrt{2} \times \sqrt{2} } \\ = 2 - \frac{2}{2} \\ = 2 - 1 = 1$

Answer 2

Answer:

1

Step-by-step explanation:

2sinAcosA=sin2A

So, 2cos45°sin45°=sin2(45°)=sin90°=1.

And tan45°=1

.: 2tan45-2sin45°cos45°= 2-1=1.