Question

value of cosA * sinA​

Answer 1

Answer:

SinA+ CosA

SinA + Sin(π/2-A)

(SinA + SinB= 2Sin((A+B)/2)Cos((A-B)/2))

SinA + Sin(π/2-A)

=2 Sin((A+π/2-A)÷2)Cos((A-π/2+A))÷2)

=2 Sin(π/4)Cos(A-π/4). Sin(π/4)=1/√2

=√2×Cos(A-π/4)

Answer 2

Step-by-step explanation:

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