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
forsale [732]
2 years ago
9

Tan9 - tan27 - tan63 + tan 81 = ?

Mathematics
1 answer:
ludmilkaskok [199]2 years ago
8 0
Tan9−tan27−tan63−tan81
tan9+tan81−tan27−tan63
sin9/cos9+sin81/cos81−sin27/cos27−sin63/cos63
sin90/cos81cos9−sin90/cos63cos27
1/sin9cos9−1/sin27cos27
2/sin18−2/sin54
(2)sin54−sin18/sin18sin54
4cos36sin18/sin18cos36=4
You might be interested in
when (2x - 3)^2 is subtracted from 5x^2, what is the result? And how can I show the answer? Thank you x
Leni [432]
5x^2 - (2x - 3)^2 = 
5x^2 - ((2x - 3)(2x - 3)) =
5x^2 - (4x^2 - 6x - 6x + 9) =
5x^2 - (4x^2 - 12x + 9) =
5x^2 - 4x^2 + 12x - 9 =
x^2 + 12x - 9 <===
3 0
3 years ago
Read 2 more answers
Is -30 - (-52) positive or negative?
Luba_88 [7]

Answer:

positive

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is ​ BC ​?
gtnhenbr [62]

BC = 18

AB = AC, hence

8x - 4 = 5x + 11 ( subtract 5x from both sides )

3x - 4 = 11 ( add 4 to both sides )

3x = 15 ( divide both sides by 3 )

x = 5

BC = 4x - 2 = (4 × 5 ) - 2 = 20 - 2 = 18


3 0
3 years ago
Question 1= Can Kayla conclude that ∆ABC and ∆EDC are similar? Why or why not?
klasskru [66]
We know that 1 side is 100 and 1 angle is 90 degrees
we would need at least 1 more angle or 1 more side length to say that they are similar

no
but, if we asssume that DCB is a straignt line, then we can say that they are similar


2. if we say taht they are similar then DE=AB, so then 175=DE=AB
7 0
2 years ago
How long will it take you to ski a distance of 36 miles at a speed of 3 miles per 30 minutes
vaieri [72.5K]
36 ÷ 3 = 12
12 x 30 = 360 (mins)

The answer is that it would take you 360 minutes to ski a distance of 36 miles.
or you could say: t would take you 6 hours to ski a distance of 36 miles.
7 0
3 years ago
Other questions:
  • Lin has picked 1 ½ cups of raspberries, which is enough for ¾ of a cake. How many cups does she need for the whole cake?
    8·1 answer
  • Aaron borrows 150.00 from Austin.he promised to pay back the money in 4 monthly installments.each month he wants to pay half the
    11·1 answer
  • You started with $300, and you spent $115 on Jake. You also set aside money to cover the sales tax on $300. Now it's your turn t
    8·1 answer
  • Helppp plz ASAP TY :&gt;
    15·2 answers
  • (52x + 70) - (-36x + 18)
    9·1 answer
  • Jamie is saving to buy a video game system. He has saved $16, which is 5% of the total cost. What is the cost of the video game
    11·1 answer
  • -4x + 8 &gt; 12 inequality solution ?
    7·1 answer
  • Express 14 as a percent <br>140%<br>1.4%<br>14%<br>0.014%​
    7·1 answer
  • PLease Help! I will give you the brainiest and a lot of points!
    12·1 answer
  • a crew is picking up chairs in the gymnasium after an event. after clearing 217 chairs from the gym floor, 36 chairs still remai
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!