1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kolezko [41]
3 years ago
8

Sin(a+b).cos(a-b) = sinacosa + sinbcosb

Mathematics
1 answer:
Rainbow [258]3 years ago
4 0
Sin (A + B) = sin A cos B + cos A Sin B 
<span>Cos (A - B) = cos A cos B + sin A sin B </span>

<span>=> (SinACosB+ CosASinB) (CosACosB +SinASinB) </span>

<span>=>SinACosACos^2B+Sin^2ACosBSinB+Cos^2A... </span>

<span>=>SinACosA(Cos^2B+Sin^2B) +SinBCosB(Sin^2A+Cos^2A) </span>
<span>we know that Sin^2+Cos^2=1 </span>
<span>=>SinACosA(1)+SinBCosB(1) </span>
<span>=SinACosA+SinBCosB </span>
<span>Proved 

</span>
You might be interested in
Y=5x-10 how do i graph this
polet [3.4K]
Plot (0,-10) Then follow rise over run Sooo up 5
5 0
3 years ago
Two more than a certain number is 15 less than twice the number. Find the number
Svetllana [295]
2+x=2x-15
>> 2+15=2x-x
>> 17 = x

So the answer is <u>17</u>
6 0
3 years ago
Read 2 more answers
I need help and can u please show your work please and thank u
aivan3 [116]

Answer:

Ur mom lol she gave birth to a kid who knows nothin

Step-by-step explanation:

6 0
3 years ago
Please help me asap!!!
fenix001 [56]

Answer:

Already answered it

Step-by-step explanation:

6 0
2 years ago
Is 14/950 more or less than 1/2 and why!
qwelly [4]
Well because 14 is nowhere near half of 950 (which is 475), 1/2 is bigger. I hope this helped.
3 0
3 years ago
Other questions:
  • How to do expanded form and word for for 119 000 003
    12·1 answer
  • Please answer correctly only
    8·1 answer
  • What is 3819 divided by 19
    7·2 answers
  • How a net useful when finding te surface area<br> of prism and pyramid
    11·1 answer
  • Compare using &lt; or &gt; 8.86_ 8.65​
    14·1 answer
  • HELP ASAP PLEASE!!!!!!! WILL MARK BRAINLIEST
    9·2 answers
  • Y= -16t(squared) + 400<br><br> What is t???
    9·1 answer
  • 15/16 as a decimal rounded to the nearest tenth
    9·1 answer
  • Eight more than twice a number is equal to ten leas five times the number, n. Which equation can be used to find n?​
    9·2 answers
  • Which expressions are equivalent to the expression 48a - 36b? Select All that apply.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!