Math, asked by nkshan15, 1 year ago

(3 - 4 sin square theta )/cos square theta

Answers

Answered by NeelamG
2
ans is equal to 4- sec^2theta
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nkshan15: can we prove it
NeelamG: ye ans bhi right h
NeelamG: auu book vale ans k liye aage bhi solve kr skte
NeelamG: yes
NeelamG: i.e 1+tan^2 theta= sec^2 theta
NeelamG: so 1-sec^2 theta= tan^2 theta
NeelamG: then ans is 3+ tan ^2 theta
NeelamG: sory
NeelamG: 1-sec^2 theta = - tan^2 theta, so ans is 3- tan^2 theta
NeelamG: u understand it
Answered by sandy1816
1

 \frac{3 - 4 { \sin}^{2}  \theta}{ { \cos}^{2}  \theta}  \\  \\  =  \frac{3 - 3 { \sin}^{2} \theta -  { \sin}^{2} \theta  }{ { \cos}^{2} \theta }  \\  \\  =  \frac{3(1 -  { \sin}^{2} \theta) -  { \sin}^{2}  \theta }{ { \cos}^{2} \theta }  \\  \\  =  \frac{3 { \cos}^{2}  \theta -  { \sin}^{2} \theta }{ { \cos}^{2} \theta }  \\  \\  = 3 -  { \tan}^{2}  \theta

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