Solve: sec theta +tan theta =√3
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,JUST USE THE FORMULA SEC 2 THETA - TAN 2 THETA = 1
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Step-by-step explanation:
1/cos theta+sintheta/costheta=✓3
1+sin theta=√3cos theta
squarring on both sides
1+sin^2theta+2sinthetha=3cos^2theta
adding cos^2thetha in both sides
1+sin^2thetha+cos^2thetha+sin^2thetha=4cos^2thetha
2+2sinthetha=4cos^2thetha
1+1sinthetha=2cos^2thetha
1+1sinthetha=2-2sin^2thetha
sintheta=1-2sin^2thetha
2sin^2thetha+sinthetha-1=0
this a quadratic equations in sin theta
solving we get
sinthetha=1/2 or-1
but -1 not satisfies
therefore thetha=30°
hopes it helps you
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