Question

please tell the answer fastly ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................​

Answer 1

Answer:

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Answer 2

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given here

(1)[ (1+sin x)/cosx] +[(cos x/(1+sinx)]

=[ (1+sinx)(1+sinx)+(cosx × cos x)]/(cosx)(1+sinx)

=(1+sin²x +2sinx +cos²x)/(cos x)(1+sinx)

=(1+1+2sinx)/(cos x )(1+sinx)

=(2+2sinx)/(cos x)(1+sinx)

=2(1+1+sinx)/(cosx)(1+sin x)

=2/(cosx)

=2secx

That's proved

important formula

(1)(a+b)²=a²+b²+2ab

(2)sin²x+cos²x=1

(3)secx=1/cosx

Note:-next question u can solve this way

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