In a `DeltaABC, b cos^(2) C/2 + c cos^(2) B/2` is equal to

In DeltaABC , " find " b cos ^(2).(C)/(2)+c cos^(2).(B)/(2)

In a DeltaABC, cos""(A)/(2)cos""(B)/(2)cos""C/(2) is

In a DeltaABC, cos""(A)/(2)cos""(B)/(2)cos""C/(2) is

If A+ B + C = pi, then cos^(2) A + cos ^(2) B + cos ^(2) C is equal to : A) 1 - cos A cos B cos C B) 1 - 2 cos A cos B cos C C) 2 cos A cos B cos C D) 1 + cos A cos B cos C

If A+B+C =pi, then cos ^(2) A+ cos ^(2)B - cos^(2) C is equal to

If A+B+C =pi, then cos ^(2) A+ cos ^(2)B + cos^(2) C is equal to

If A+B+C=pi , then cos^(2)A+cos^(2)B+cos^(2)C is equal to

In DeltaABC,cos^2""A/2+cos^2""B/2+cos^2""C/2=

If in a DeltaABC , a^2cos^2A=b^2+c^2, then