Question

If SinA + CosB = 1, then find A+B.​

Answer 1

Answer:

90°

Step-by-step explanation:

As given :

A=30°-------(A)

Substitute the value in given equation

SinA+cosB=1

So, Sin30+cosB=1-------(1)

We know that sin30=1/2-------(2)

Substitute this value in (1) we get,

1/2+cos B=1 - - - >cosB=1-1/2

So cos B=1/2 or B=60°-------(B)

TO FIND : A+B

SUBSTITUTE THE VALUE OF A AND B

SO A+B=30+60=90°

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