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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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asked
Mar 23, 2019
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Class 11
by
kratos
Prove that:
cos(pi/4 - x)cos(pi/4 - y) - sin(pi/4 - x)sin(pi/4 - y) = sin(x + y)
class-11
trigonometric functions
cbse
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answered
Jun 10, 2020
by
kratos
Best answer
L.H.*.
= R.H.*.
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