Question

2 sin^2 30-2 cos^2 45+tan^2 60​

Answer 1

Answer:

-7/18

Step-by-step explanation:

2sin^2(30°) - 2cos^2(45°) +tan^2(60)

2×1/4 - 2×1/2 +1/9

1/2 - 1 +1/9

(9-18+2)/18

-7/18