Question

please give me ans ques no... 21​

Answer 1

Hey mate here is your answer hope it helps

Answer 2

Answer:

Step-by-step explanation:

(1-cosΦ)(1+cosΦ)(1+cot²Φ)=1

L. H. S=

1²-coSΦ²(1+cot²Φ)

Sin²Φ × cosec²Φ

Sin²Φ × 1 / sin²Φ

Sin²Φ will cut so, here left

1 = R. H. S

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Hope it help u

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