Do+ 2+ usoProne that. (sino + 2+ Cecaso ). se o cos 0.2sin 0-14 – InterviewSolution

1.

Do+ 2+ usoProne that. (sino + 2+ Cecaso ). se o cos 0.2sin 0-14

Answer»

Let theta = x

Then,(sinx + 1 + cosx)(sinx - 1 + cosx).secx.cosecx

= (sinx + cosx + 1)(sinx + cosx - 1).secx.cosecx

= [(sinx + cosx)^2 - 1].secx.cosecx

= (sin^2 x + cos^2 x + 2sinx.cosx - 1).secx.cosecx

= (1 - 1 + 2sinx.cosx).secx.cosecx

= 2sinx.cosx.1/cosx.1/sinx

= 2

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