If `A=sin45^0+cos45^0a n dB=sin44^0+cos44^0,` then `(a)A>B (b) A=B`

If cos 25^0 + sin 25^0 = p , then cos 50^0 is equal to

Expand cos ( A + B + C). Hence prove that cos A cos B cos C = sin A sin B cos C + sin B sin C cos A + sin C sin A cos B, if A + B + C = (pi)/(2) .

If sinA=sinBa n dcosA=cosB , then prove that sin(A-B)/2=0

if ( cos A + cos B )/( sin A + sin B ) = k ( (sin A - sin B)/ ( cos A- cos B)) then k is

Find the value of cos 45^(@) + sin 45^(@)

cot16^0cot44^0+cot44^0cot76^0-cot76^0cot16^0 = (a) 1 (b) 2 (c) 3 (d) 4

Prove that sin (A+B) sin (A-B)=cos^(2) B-cos^(2) A

Prove that sin (A+B)= sin A cos B + cos A sin B.

If y = A cos 4 x + B sin 4 x, A and B are constants then Show that y_2 + 16y =0