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(tanɵ+sec ɵ-1)/(tanɵ-secɵ+1)=(1+sin ɵ)/ (cosɵ) prove that with clear expalnation

(tanɵ+sec ɵ-1)/(tanɵ-secɵ+1)=(1+sinɵ)/ (cosɵ)  prove that with clear expalnation

Grade:12th pass

1 Answers

Saurabh Dubey
25 Points
6 years ago
I assume ɵ = XLHS = (tanX+sec X-1)/(tanX-secX+1) we know that [sec²X - tan²X = 1]Replacing 1 by sec²X - tan²X in numeratorso LHS = [tanX + secX- (sec²X - tan²X)] /[tanX-secX+1]we can write sec²X - tan²X = (secX+ tanX)(secX- tanX)as A²-B²= (A+B)(A-B)= [ (tanX + secX)-(secX + tanX)(secX - tanX)] /[tanX-secX+1]=[(tanX + secX)(1-secX+tanX)]/[tanX-secX+1]=(tanX + secX)=( sinX/cosX) + (1/cosX)= (sinX + 1)/cosx = RHS ....proved...

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