Question

evaluate 2 tan square 45 degree + cos square 30 degree- sin square 60degree

Answer 1

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Answer 2

2tan^2 45° + cos^2 30° - sin^2 60°

=2tan^2 45° + cos^2 30° -cos^2(90°-60°)

= 2tan^2 45° + cos^2 30° - cos^2 30°

= 2tan^2 45°

=2(1)^2

=2

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