Question

3tan² 45° - sin² 60 - cot 30 + sec² 45°​

Answer 1

`4.25-√(3).`

Explanation:

1) tan45=1; sin60=√3/2; cot30=√3; sec45=√2, then

2) 3-0.75-√3+2=4.25-√3 (it is ≈2.5179492).