Question

1) tan 9º – tan 27º – cot 27° + cot 9° = 4.​

Answer 1

Answer:

x=tan81+tan9−(tan63+tan27) =cot9+tan9−(cot27+tan27) =(cos9)2+(sin9)2sin9⋅cos9−(cos27)2+(sin27)2sin27⋅cos27 =1sin9⋅cos9−1sin27 ...

Step-by-step explanation:

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