Question

(1-tan2 45/1+tan2 45) + cos2 30 - cot2 30 + sin 30.​

Answer 1

Answer:

$\frac{1-tan^{2}45^{o}}{1+tan^{2}45^{o}}$ + cos²30° - cot²30° + sin30° = -2

Step-by-step explanation:

Given: $\frac{1-tan^{2}45^{o}}{1+tan^{2}45^{o}}$ + cos²30° - cot²30° + sin30°

= $\frac{1-1^{2}}{1+1^{1}}+(\frac{\sqrt{3}}{2})^{2}-(\sqrt{3})^{2}+(\frac{1}{2})^{2}$

= $0+\frac{3}{4}-3+\frac{1}{4}$

= 1-3

= -2

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