pls fast ...........
If m = cos A - sin A and n = cos A + sin A ; show that
m²+n² = 1 secA.cosA=(cotA+ tanA)
____ _ _________
m²-n² 2 2
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given,
see first image.
Now,
see 2nd and 3rd image.
the proof is completed
see first image.
Now,
see 2nd and 3rd image.
the proof is completed
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