सिद्ध कीजिए: cos(pi/4 -x) cos(pi/4 -y) -...

सिद्ध कीजिए: `cos(pi/4 -x) cos(pi/4 -y) - sin(pi/4-x) sin(pi/4-y)= sin(x+y)`

सिद्ध कीजिए: cos(pi/4 -x) cos(pi/4 -y) - sin(pi/4-x) sin(pi/4-y)= sin(...
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Prove that:cos(pi/4-x)cos(pi/4-y)-sin(pi/4-x)sin(pi/4-y)=sin(x+y)
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Prove the following cos(pi/4-x)cos(pi/4-y)-sin(pi/4-x)sin(pi/4-y)=sin...
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cos(pi/4-x)cos(pi/4-y)-sin(pi/4-x)sin(pi/4-y)=sin(x+y)
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cos .((pi)/(4)-x) cos ((pi)/(4)-y) –sin ((pi)/(4) –x) sin ((pi)/(4)-y)...
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निम्नलिखित को सिद्ध कीजिये : cos. (pi/4 -x) cos. (pi/4 -y) -...
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What is the value of cos(pi/4-x)cos(pi/4-y)-sin(pi/4-x)sin(pi/4-y)?
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Prove that cos (pi/4-x) cos (pi/4-y)- sin (pi/4-x) sin(pi/4-y) =si...
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निम्नलिखित को सिद्ध कीजिए : cos (pi/4 - x) cos (pi/4 - y) - sin (pi/...
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