Question

prove that cot 48°•cot 23°•cot42°•cot67°=1​

Answer 1

Step-by-step explanation:

Cot 48.Cot23.cot42.cot67

Cot48.cot33.Tan48.Tan23

1x2

1

Answer 2

Answer:

Given: cot48°.cot23°.cot42°.cot67°

We need to prove that it is equal to :- 1

So first convert cot into tan

(REMEMBER:- That the higher degree is always changed.)

So, tan(90°-48°). cot23°. cot42°. tan(90°-67°)

Therefore, tan23°.cot23°.cot42°.tan42°

(As we know that tan. cot=1 and cot. tan=1)

Therefore, 1×1

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|Final Answer:- 1 |

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*Definitely Deserves to be the brainlest Answer.*