Question

If sin x = cos y, show that x + y =90 ​

Answer 1

Answer:

sinx and cos y equal when x=y= multiple of pie by 4

Step-by-step explanation:

pie by 4 plus pie by 4 = 90

hence proved

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Answer 2

Answer:

=>  sinX=cosY

=>  sinx=sin(90-y)

=>   x=90-y

=>   x+y= 90

Step-by-step explanation:

We konw sin(90-Ф)=cosФ

               also cos(90-Ф)=sinФ

           ∴ sinx=sin(90-y)