Question

if sinx+cosx=1 , then 3cosxsinx=?

Answer 1

Answer:

(sinx+cosx)^2=1^2

sin^2x+cos^2x+2sinx×cosx=1

1+2sinx×cosx =1

2sinx×cosx= 1-1

sinx×cosx=0

3sinx×cosx=0

3cosxsinx=0

Answer 2

Answer:

0

Step-by-step explanation:

sinx + cosx= 1

(sinx+cosx)^2=1

sin^2 x +cos^2 x +2sinx cosx =1

2sinx cosx=0

3/2 sinxcosx=0