Sin2x=2sinxcosx, cos2x=1-2sin^2x
sin(2x)+cos(3x)=2sinxcosx+cos(x+2x)
cos(x+2x)=cosx(1-2sin^2(x))-sinx2sinxcosx
sin(2x)+cos(3x)=2sinxcosx(1-sinx)+cosx(1-2sin^2(x))
Answer:
D. 1,019 square feet
Step-by-step explanation:
10x13x8 - 3x7
Answer:
12 and 1/4
Step-by-step explanation:
The answer must be

since the triangular pyramid has 4 faces and each has an area of 30

we should multiply that by 4 , so :