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Prove that sinx + cos x=1

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Prove that sinx + cos x=1

Posted by Sonu Riar 6 years, 10 months ago

CBSE > Class 11 > Mathematics

1 answers

Sinchana Malagond 6 years, 10 months ago

sin x + cos x is equal to 1 so on squaring both sides science sin x sin square x is equal to 1 - cos x cos square sin square x is equal to 1 - 2 cos x + cos square x so on both on lhs and RHS one gets cancelled then 2 cos x - 2 cos square x is equal to zero let us consider f of x is equal to 2 cos x - 2 cos square x so on common to cos x bracket 1 - cos x is equal to zero cos x is equal to zero cos x is equal to -1 integrating with potential solutions x is equal to zero x is equal to 5 by 2 x is equal to 3 pi by 2 and x is equal to 25 but only x is equal to zero x is equal to 25 by 2 and X is 2 Pi it is in the period of coordinates zero to buy a real so cos x + sin x is equal to 1

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