1.

If SinA+SinB=2;then the value of CosA+CosB.

Answer»

SinA + SinB = 2

It means A and B are 90 because sin90 = 1

SIN A = 1/Cos A and Sin b = 1/cos B according to trignomatry

1/Cos A + 1/ Cos B = 2

Cos A + Cos B = 2 X Cos A Cos B

Cos A + Cos B = 2 x Cos 90 x Cos 90 = 0 Answer


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