Math, asked by jabinphilipose8990, 1 year ago

Prove that Sin(π/4+x)sin(π/4-x)=1/2cos2x

Answers

Answered by Anonymous
37

Answer:

Step-by-step explanation:

Sin(π/4+x)sin(π/4-x)

=1/2(2Sin(π/4+x)sin(π/4-x))

=1/2*[cos(π/4-x-π/4-x)/2+cos(π/4-x+π/4+x)

=1/2[cos(-2x)+cos(π/4+π/4)]

=1/2(cos2x+0]

=1/2(cos2x

Answered by architsrivastava2203
1

Step-by-step explanation:

answer in image given above

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