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
xz_007 [3.2K]
3 years ago
14

Solve the equation exactly overbthe interval [0,360) Sin^2x-cos^2x=0

Mathematics
1 answer:
trasher [3.6K]3 years ago
8 0
\bf sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)\\\\
-----------------------------\\\\

\bf sin^2(x)-cos^2(x)\implies sin^2(x)-[1-sin^2(x)]=0
\\\\\\
sin^2(x)-1+sin^2(x)=0\implies 2sin^2(x)=1\implies sin^2(x)=\cfrac{1}{2}
\\\\\\
sin(x)=\pm\sqrt{\cfrac{1}{2}}\implies \measuredangle x=sin^{-1}\left( \pm\sqrt{\cfrac{1}{2}} \right)\iff \measuredangle x=sin^{-1}\left( \pm\cfrac{\sqrt{2}}{2} \right)
\\\\\\
\measuredangle x=
\begin{cases}
\frac{\pi }{4}\\\\
\frac{3\pi }{4}\\\\
\frac{5\pi }{4}\\\\
\frac{7\pi }{4}
\end{cases}
You might be interested in
Total
WITCHER [35]

Answer:

The right answer for the question that is being asked and shown above is that: "d. P(A and B) = x + y." The probability of event A is x, and the probability of event B is y. If the two events are independent, the condition must be true is this d. P(A and B) = x + y

Read more on Brainly.com - brainly.com/question/1295200#readmore

Step-by-step explanation:

6 0
3 years ago
A bookstore costs $96 a day to keep open, and it spends $12 for each book that it sells. If each book sells for $18, what is the
asambeis [7]

Answer: The break even point is when they have sold 16 books and have made $288

Step-by-step explanation:  The costs are modeled in the equation y = 12x + 96.  x is the number of books sold.

The earnings are modeled by he equation y = 18x.

Substitute 18x for y and solve for x.

18x = 12x + 96  Subtract 12x from both sides.

6x = 96 Divide both sides by 6

x = 16

Substitute into the original equations to solve  for y

y = 12(16) + 96

y = 192 + 96

Y = 288

y = 18(16)

y = 288

7 0
3 years ago
Why is a financial plan important?????
mafiozo [28]
Without a financial plan, you can end up having a lot of debt. You also may not think about saving money for future expenses or how much you may need. Financial plans are very important for your future. 
8 0
3 years ago
Distance between (5,4) and (1,-2)
vlada-n [284]

Answer:

4 units

Step-by-step explanation:

8 0
3 years ago
If n + 10 = 45.5, then what is the value of the expression n - 25?
Citrus2011 [14]

Answer: 90

Step-by-step explanation:

45.5-.5=45

45^2=90

8 0
3 years ago
Other questions:
  • Hey can you please help me posted picture of question
    14·2 answers
  • Why are percents rational numbers
    10·2 answers
  • What pattern do you see when you count to 30
    15·1 answer
  • f 5 + x = 12, and you add -5 to the left side of equation, what should you add to right side of equation?
    15·1 answer
  • If 3^b/3^6= 3^3, then b=
    15·1 answer
  • Afflatus is a BIG brain
    11·2 answers
  • If electricity comes from electrons, does morality come from morons?
    6·2 answers
  • Simplify the attached question​
    13·2 answers
  • There are 5 different coloured cups in a row.
    9·1 answer
  • 1. y - 5 = -2(x - 3) in standard form (pls explain)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!