Question

Cos A + Sin B = 1; A=60° and B is an acute angle, then find the value

of B​

Answer 1

Step-by-step explanation:

cosA+sinB =1 (given)

putting the vale of A=60

cos 60+sinA=sin90 (sin 1= sin 90)

then

cos(90-60)+sinB=sin90

on equating sin we get

sin 60+ B = 90

60+B=90

B=90-60

.

. . B=30