17. If sec+ tan 8 = x, then tane -(A)0Dags

1.	17. If sec+ tan 8 = x, then tane -(A)0Dags
Answer» sec+tan=xsquaring both sides we get(sec+tan)²=x²sec²+tan²+2sectan=x²1+tan²+tan²+2(x-tan)tan=x²1+2tan²+2xtan-2tan²=x²1+2xtan=x²2xtan=x²-1tan=(x²-1)/2xso correct option is C as by squaring both side..(secA+ tanA)™=x™tanA =x*x-1/2x

Answer»

sec+tan=xsquaring both sides we get(sec+tan)²=x²sec²+tan²+2sectan=x²1+tan²+tan²+2(x-tan)tan=x²1+2tan²+2xtan-2tan²=x²1+2xtan=x²2xtan=x²-1tan=(x²-1)/2xso correct option is C

as by squaring both side..(secA+ tanA)™=x™tanA =x*x-1/2x

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17. If sec+ tan 8 = x, then tane -(A)0Dags

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