prove that (sinb+Sina)/(cosb-cosa)=(cosa+cosb)/(sina-sinb)<br />
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(Sin a + sin b)/ (cos b-cos a)= (cos a +cos b)/(sin a -Sin b)
=>(Sin a+ sin b)(sins-Sin b)=(cos b +cos a)(- cos a +cos b)
=>sin^2 a-sin^2 b=cos^2 b-cos^2b
=>sin^2 a+ cos^2a=cos^2b+ sin^2 b
=>1 (PROVED)
=>(Sin a+ sin b)(sins-Sin b)=(cos b +cos a)(- cos a +cos b)
=>sin^2 a-sin^2 b=cos^2 b-cos^2b
=>sin^2 a+ cos^2a=cos^2b+ sin^2 b
=>1 (PROVED)
subhendudhua:
Not correct.
How? I equated both the sides
please prove that LHS = RHS
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