SOLUTION: Evaluate 3tan^2 60degrees + 2sin^2 30degrees - cos^2 45 degrees Please kindly tell how to evaluate this step by step thanks

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Question 767937: Evaluate
3tan^2 60degrees + 2sin^2 30degrees - cos^2 45 degrees
Please kindly tell how to evaluate this step by step thanks
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Evaluate
3tan^2 60degrees + 2sin^2 30degrees - cos^2 45 degrees
***
tan 60º=√3
tan^2 60º=3
3tan^2 60=9
..
sin 30º=1/2
sin^2 30º=1/4
2sin^2 30º=1/2
..
cos 45º=√2/2
cos^2 45º=2/4=1/2
..
3tan^2 60degrees + 2sin^2 30degrees - cos^2 45 degrees=9+1/2-1/2=9