Question

what is the value of the angles A +B​

Answer 1

Answer:

option(B)

Step-by-step explanation:

sinA=1/√10

sinB=1/√5

cosA=√1-1/10=√9/10=3/√10

cosB=√1-1/5-√4/5=2/√5

sin(A+B)=sinAcosB+cosAsinB

=1/√10*2/√5  +3/√10*1/√5

=2/√50+3/√50

=5/√50

=5/5√2

sin(A+B)=1/√2=sin45°

so A+B=45°=π/4

option(B)

Answer 2

Answer:

option B

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