Math, asked by prathameshsupal11, 2 months ago

pls solve the above I got confused in it

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Answered by amritapatel118

0

Answer:

I don't know

Step-by-step explanation:

mark as brainliest

Answered by jadunathbehera444

2

Step-by-step explanation:

cos (π/2-x) cos (π/2-y)

= sin x . sin y - cos X . cos y

= -(cos x . cos y - sin x . sin y)

= - (cos X+y)

Hence proved.

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