Question

if a+b = 90° then cos a + cos b / sin a + sin b = 1


please do it

urgent​

Answer 1

Step-by-step explanation:

LHS =

cos a + cos (90°- a)/sina + sin (90°- a)

= (Cosa + sina)/sina +cosa

= 1

=RHS

Answer 2

Hence cos a+cos b/sin a +sin b =1

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