3 years ago

Prove 2SinAsinB =cos(A-B)-cos(A+B)

1 answer:

8 0

Right side of the equation:
cos ( A - B ) - cos ( A + B ) =
= cos A cos B + sin A sin B - ( cos A cos B - sin A sin B ) =
= cos A cos B + sin A sin B - cos A cos B + sin A sin B =
= 2 sin A sin B - left side of the equation ( correct )

You might be interested in

Please help math <br>question 1,2,3,4,5

kolezko [41]

The answers:

#1 C
#2 H maybe
#3 C
#4 H or J

6 0

3 years ago

Write the equation in standard form.<br><br> 3x−9=7y

Karo-lina-s [1.5K]

3x-7y = 9
Standard form is Ax+By = C

5 0

3 years ago

I have 3 red jawbreakers 2 green 5 orange jawbreakers and 1 purple jaw breaker which color of jawbreaker can be represented as a

Sonbull [250]

2 green jawbreakers
-
⚯⚯

6 0

3 years ago

A line has this equation: y = -2x-5 Write an equation for the parallel line that goes through (-3,-5).

zhuklara [117]

Answer:

Step-by-step explanation:

y + 5 = -2(x + 3)

y + 5 = -2x - 6

y = -2x - 11

3 0

3 years ago

Geometric sequence find common ratio 0.45,0.9,1.8

prisoha [69]

Answer:

<h3>The common ratio is 2</h3>

Step-by-step explanation:

To find the common ratio of the geometric sequence divide the previous term by the next term

That's

0.9 / 0.45 = 2

1.8 / 0.9 = 2

Therefore the common ratio is 2

Hope this helps you

7 0

3 years ago