Question

if A+B= 90 degree then express cos B in the trigonometry ratio of A

Answer 1

hey friends.

A+B=90° (given )

so,, A=90°-A...if we multiply by cos¢ on both side then .

cosB=cos(90°-A)

cosB=sinA. As you know cos(90°-A)=sinA..

so, cosB= sinA

sinA is answer ..

hope it helps you.

@Rajukumar@@

Answer 2

45+45=90°
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