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Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 arithmetic calculations
[1/1 Formula]
Work: Calculate the value of equation tan20*tan30+tan30*tan40+tan40*tan20 .
Question type: Mathematical calculation
Solution:
tan20*tan30+tan30*tan40+tan40*tan20
=2.237161*tan30+tan30*tan40+tan40*tan20
=2.237161*-6.405331+tan30*tan40+tan40*tan20
=2.237161*-6.405331+-6.405331*tan40+tan40*tan20
=2.237161*-6.405331+-6.405331*-1.117215+tan40*tan20
=2.237161*-6.405331+-6.405331*-1.117215+-1.117215*tan20
=2.237161*-6.405331+-6.405331*-1.117215+-1.117215*2.237161
=-14.329757+(-6.405331)*(-1.117215)+(-1.117215)*2.237161
=-14.329757+7.156132+(-1.117215)*2.237161
=-14.329757+7.156132+(-2.49939)
=-7.173625+(-2.49939)
=-9.673015
Answer:tan20*tan30+tan30*tan40+tan40*tan20=-9.673015
Note: Radian