Math, asked by iganaie2344, 1 year ago

1 + cot theta + tan theta whole whole sin theta minus cos theta whole equal to sec theta by cosec squared theta minus cosec theta by sec squared theta

Answers

Answered by samalok09
25

Answer: Hope it helps u..

Hint: In trignometry we can also prove LHS and RHS seperately equal to something and then prove that LHS=RHS.

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Answered by amitnrw
17

(1 + Cotx + Tanx)(Sinx - Cosx) = Secx/Cosec²x   - Cosecx/Sec²x

Step-by-step explanation:

(1 + Cotx + Tanx)(Sinx - Cosx) = Secx/Cosec²x   - Cosecx/Sec²x

LHS

= (1 + Cotx + Tanx)(Sinx - Cosx)

= (1 + Cosx/Sinx + Sinx/Cosx)(Sinx - Cosx)

= (SinxCosx + Cos²x + Sin²x)(Sinx - Cosx) /(Sinx.Cosx)

=(Sin³x - Cos³x) /(Sinx.Cosx)

= Sin³x/Sinx.Cosx  - Cos³x/Sinx.Cosx

= Sin²x/Cosx  - Cos²x/Sinx

= Secx/Cosec²x  - Cosecx/Sec²x

= RHS

QED

Proved

(1 + Cotx + Tanx)(Sinx - Cosx) = Secx/Cosec²x   - Cosecx/Sec²x

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