Question

17. sin (45 + 0) - cos (45 - 0) is (1) 2 sine (2) 1 (3) 2 cos (4) O

11th - 12th Class

Maths

Solution

143

4.0 (1 ratings)

17. ( (4) sin (45+theta)-cos (45-theta) ) ( =cos left(90^{circ}-(45+theta)-cos right. ) ( (45-theta) ) ( left[because cos left(90^{circ}-thetaright)=sin thetaright] ) ( =cos (45-theta)-cos (45-theta)=0 )