Show that (sin a + coseca.)? +(cosa + sec a)?
-(tana. + cota)=7
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Step-by-step explanation:
(sin a +cosec a)+(cos a +sec a)-(tan a+cot a)=7
LHS=
(sina+1/sina)+cosa+1/cosa-sina/cosa+cosa/sina
=sin^2a+1/sina+cos^2a+1/cosa-sin^2a+cos^2a/sina cosa
=sin^2a+cos^2a+2/sina cosa-1/sina cosa
=3/sina cosa-1/sina cosa
=2/sina cosa=7
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