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बिन्दुओं A(0,0), B(cos alpha , sinalpha ...

बिन्दुओं `A(0,0), B(cos alpha , sinalpha )` और `C(cos beta, sinbeta)` यदि एक समकोण त्रिभुज के शीर्ष हैं

A

`sin "" (alpha - beta)/( 2) = (1)/(sqrt2)`

B

`cos "" (alpha - beta)/( 2) = -(1)/(sqrt2)`

C

`cos "" (alpha - beta)/(2) = (1)/(sqrt2)`

D

`sin "" (alphs - beta)/(2) = -(1)/(sqrt2)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A, C
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