Math, asked by Risha2003, 1 year ago

(1+cos²Φ)(1-cosΦ)(1+cosΦ)=1


Sharon15: is your statement correct......plz check??
Risha2003: sorry
Risha2003: it have must been (1+cot²Φ)

Answers

Answered by Tanmaydubey3007
2
Hi dear RISHA in your question it is (1+cot²Φ) instead of (1+cos²Φ) OK.

NOW answer =>(1+cot²Φ)(1-cosΦ)(1+cosΦ) = 1

L. H. S. (1+cot²Φ)1(1+cosΦ)-cosΦ(1+cosΦ)
(1+cot²Φ)(1+cosΦ-cosΦ-cos²Φ)
(1+cot²Φ)(1-cos²Φ) [1+cot²Φ=cosec²Φ, 1-cos²Φ=sin²Φ]


cosec²Φ.sin²Φ
cosec²Φ1/cosec²Φ

1=1. (proved)

it will help completely.

u will understand.

/THANKS /

Risha2003: sorey i didnot get ur point...the question i haved typed is absolutely correct
Risha2003: oops sorry
Risha2003: its was my fault
Tanmaydubey3007: ok dear it's all right be happy
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