Shuniva68
Shuniva68 Shuniva68
  • 02-10-2021
  • Mathematics
contestada

Simplify
(sinA +cosA) (sinA-cosA) ​

Respuesta :

bosm93
bosm93 bosm93
  • 02-10-2021

Answer:

-cos(2A)

Step-by-step explanation:

We know that (a+b) (a-b) = a^2-b^2

So it means we can simplify to sin^2(A)-cos^2(A) and we know cos^2(A) - sin^2(A) = cos(2A) but we will just multiply by -1 and we get - cos(2A)

Answer Link

Otras preguntas

Help with 4-8 please
Amy Weir had these job expenses last year: union dues, $650; tools, $1,890; uniforms, $375; licenses, $480. She earned $49,500 in wages and received benefits wo
read the last 10 words of the poem you may observe a change in the tone what is that about​
Select the equivalent expression. \left(3^4\cdot b^5\right)^{2}=?(3 4 ⋅b 5 ) 2 =?left parenthesis, 3, start superscript, 4, end superscript, dot, b, start
What does ''something'' refer to? Choose the phrase that completes the sentence.
please help me with this
preoperational children tend to focus on one aspect of a situation and neglect others, leading to illogical conclusions. piaget called this tendency
Match the descriptions to the Four Noble Truths they represent.
Complete the chart by dragging and dropping the correct meaning into the third column to match the term in each row and then write a sample sentence in the four
Oranges cost $21 for 7. a. What is the cost per orange? PLEASE ANSWER