Question

pls evaluate this sum from Trigonometry
2cos0° - 2sin²45° + sin90° + tan45°​

Answer 1

Answer:

3

Step-by-step explanation:

Cos0°=1

Sin45°=1/√2

Sin90°=1

Tan45°=1

Let us substitute

$2(1) - 2( { \frac{1}{ \sqrt{2} }) }^{2} + 1 + 1$

$= 2 - 2 \times \frac{1}{2} + 1 + 1$

$= 2 - 1 + 1 + 1$

$= 2 + 1$

$= 3$