Use the double angle function sin2x = 2sinxcosx.

2sinxcosx + sinx = 0

For the first part of the problem, consider the solutions on the interval where sinx = 0

x = 0, pi

Now consider the solutions where sinx does NOT equal zero.

2sinxcosx + sinx = 0

2sinxcosx = - sinx

2cosx = - 1

cosx = - 1/2

x = 2pi/3, 4pi/3

5 0

3 years ago

Please answer!!!!!!!

oksano4ka [1.4K]

Answer:

Quadruple Trials b

Step-by-step explanation:

Be a happy person!!

4 0

3 years ago

simplify 4 (5c ÷4d)-16 show me how you figure it out to put the numbers in this and I'll be asking two more questions for the ni

Darya [45]

$4(5c + 4d) - 16 \\ 20c + 16d - 16$
This is your final answer none of the terms are "like terms".

7 0

3 years ago