what is the value of cos square 67 degree minus sin square 23 degree
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singhshivam0331:
Ans is zero
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Cos2 67°-sin2 23°
cos2 (90-23)-sin2 23
sin2 23 - sin2 23
one is+ or one is - so both are cut.
And answer is=0
cos2 (90-23)-sin2 23
sin2 23 - sin2 23
one is+ or one is - so both are cut.
And answer is=0
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