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Evaluate: tan^2(120°) - 2 cot 240°

Question

Evaluate: tan^2(120°) - 2 cot 240°

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Step 1

To compute the given trigonometric expression

Step 2

Use the standard formulae : tan (180-x...

tan(120)=-tan(180-60)
- 5 tan (120) 3
=-tan 60
1
from above;
cot(240)= cot(360-120)=-cot120
2
tan (120)-2cot(240) = 3
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tan(120)=-tan(180-60) - 5 tan (120) 3 =-tan 60 1 from above; cot(240)= cot(360-120)=-cot120 2 tan (120)-2cot(240) = 3

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Trigonometry

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