Sinxcos y = 1/2(sin(x + y) + cos(x - y)) true or false

False

sin x cos y (sin (x + y) + cos (x - y))

Step-by-step explanation:

Given

To verify  that the equality is true or false

 and

Now adding the above equations we get

Comparing  the equations (1) and (2) we get

Therefore the given equality is not true (ie, false)

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation: