Question

22) If Sin’A +Cos’A = a and SinA +Cos
A= b then value of 2a+ b3 is
аз
Ob
O b3
Оза​

Answer 1

Answer:

inA+cosA=1

∴(sinA+cosA)

2

=1

2

∴sin

2

A+cos

2

A+2sinAcosA=1

∴1+sin2A=1

∴sin2A=