The derivative of e to the (x + 3) power RT

The derivative of e to the (x + 3) power RT

y'=e^(x+3)×(x+3)'=e^(x+3)

Evaluation of sine and cosine of triangle
Cos 78 degree sin 42 degree + sin 78 degree sin 48 degree =?

Solution;
∵sin48=sin(90-42)=cos42
Ψ cos 78 degree sin 42 degree + sin 78 degree sin 48 degree
=Cos78 degree sin42 degree + sin78 degree cos42 degree
=sin(42+78)
=sin120
=√3/2

Who knows the sine cosine formula of triangle?

Sine theorem: let the three sides of a triangle be ABC, their diagonals be ABC respectively, and the radius of circumscribed circle be r, then the relation a / Sina = B / SINB = C / sinc is sine theorem. Cosine theorem: let the three sides of a triangle be ABC, their diagonals be ABC respectively, then the relation a ^ 2 = B ^ 2 + C ^ 2-2bc * cosab ^ 2 = C ^ 2

Given that ab = - 1, a + B = 2, then the formula Ba + ab=______ ．

∵ab=-1，a+b=2，∴ba+ab=b2+a2ab=(a+b)2−2abab=4+2−1=-6．

Given the equations AB + a = 2008, AB + B = 2007, if a and B represent an integer respectively, then the value of A-B is ()
A. 2B. 1C. 2000D. 0

According to the meaning of the title, AB + a - (AB + b) = A-B = 1

If 3 / M + 1 and 3 / 2m-7 are opposite numbers, then M =?

3/m+1+3/2m-7 =0 9/2m=6 m=3/4