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
faust18 [17]
3 years ago
8

Sin^2A-cos^2B=sin2^B-cos^2A​

Mathematics
1 answer:
Rashid [163]3 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

Using the trig identity

sin²x + cos²x = 1 , then

sin²x = 1 - cos²x

cos²x = 1 - sin²x

Consider the left side

sin²A - cos²B

= (1 - cos²A) - (1 - sin²B) ← distribute parenthesis

= 1 - cos²A - 1 + sin²B

= sin²B - cos²A

= right side , thus verified

You might be interested in
Ellie practices piano 2/3 h per day, several days each week. She practiced piano 32/23 hours during the summer.
butalik [34]

Let us assume that the number of days she practiced the piano to be "d"

Since she practiced 2/3 hours a day, the total number of hours would be: 2/3*d

Now we are given the total number of hours during summer that she practiced  be be equal to 32/23

So we equate 2/3 * d to 32/23 to find d

2/3*d = 32/23

d = (32/23)/ (2/3)

d = (32/23) * (3/2)

d = 48/23 hours

The equation that can be used to find the number of days that she practiced piano during the summer is 2/3*d = 32/23

3 0
3 years ago
A TV that usually sells for $195.72 is on sale for 20% off. If sales tax on the TV is 9%, what is the price of the TV, including
Nuetrik [128]

The total cost of the TV is: $181.57


Work: 195.72 x 0.20 (20%) = 39.14

195.72 - 39.14 = 166.58 <-- Was for the discount now you have to do the tax.


Now Tax, 166.58 + 14.99 = 181.57


Hope this helps!

7 0
3 years ago
Read 2 more answers
The line segment has an endpoint (5,-6) and the midpoint is (-2,3). Find the other point.
gavmur [86]

Answer:

(-9,12)

Step-by-step explanation:

Endpoint\:= (5,-6) = x_1,y_1\\Midpoint = \: (-2,3)=x\:,y\\\\x = \frac{x_1+x_2}{2}\\\\ -2 = \frac{5+x_2}{2} \\-4 = 5+x_2\\-4-5=x_2\\-9 =x_2\\\\y = \frac{y_1+y_2}{2} \\\\3 = \frac{-6+y_2}{2} \\6 = -6+y_2\\6+(6)=y_2\\6+6=y_2\\12=y_2\\x_2 ,y_2=(-9,12)

4 0
3 years ago
How do you do this? can someone explain it to me please?​
My name is Ann [436]

Answer:

you have to detect the angles on itmeasure the angles on the empty side wheree there are no numbers based on what the other side is

Step-by-step explanation:

7 0
3 years ago
Having a wife is monogamy. Having two wives is bigotry. Having three wives is ______________.
zhannawk [14.2K]

Answer:

polygamy

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Susan has 3 lists, each with 10 numbers. If there are 4 numbers on all three lists and 5 numbers on exactly 2 lists, how many nu
    14·1 answer
  • Make a 10 or 100 to subtract mentally 76-59 =
    14·2 answers
  • Write an algebraic expression for 8 less than 4 times a number
    6·1 answer
  • In cell B8 created a formula without using a function that multiplies the value in cell B7 by the value in cell B6 and then adds
    13·1 answer
  • How do I solve 964x83
    5·2 answers
  • The vertices of triangle IJK have coordinates I(−5, −2), J(−5, −4), and K(−4, −4).
    11·1 answer
  • PLEASE HELP ME ASAP I AM STRUGGLING SO MUCH MY WORK IS LITERALLY DUE NOW I'VE BEEN UP ALL NIGHT TRYING TO SOLVE IT AND MY ONLY S
    9·2 answers
  • PLEASE HELP ME BRAINLY I WILL GUVE BRAINLEST
    13·2 answers
  • IF YOU CAN ANSWER THESE 2 QUESTIONS I WILL GIVE BRAINLIEST!
    15·2 answers
  • Paulina is going to give away some
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!