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
NISA [10]
3 years ago
10

Solve sint = cos2t, for –4π ≤ t ≤ –2π

Mathematics
1 answer:
e-lub [12.9K]3 years ago
3 0

Answer:

-(23/6)π

-(19/6)π

-3π

Step-by-step explanation:

cos2t=cos^2t-sin^2t => cos^2t=1-sin^2t =>cos2t=1-2sin^2t

sint=1-2sin^2t, if x=sint, thenn we have 2x^2+x-1=0

Here x=0.5, x=-1, as x=sint => sint = -1 solutions for -4π to -2π is t=-3π,

sint = 0.5 solutions for -4π to -2π is t= -(23/6)*π, and t = -(19/6)*π

You might be interested in
Greg borrowed $100 from his parents. After he did some chores, they reduced the amount of his debt by $25.
Mariana [72]

Answer:

6. ,!,,,,,,,,,,,,,,,,,,,,,,,,mmm,m,,,mmm,,,,,,,,,,,,

3 0
3 years ago
What is the slope of the line that contains the points (-1,9) and (5,21)
geniusboy [140]
Y-y
——-
X-x

21-9=12
5-(-1) =6
So the answer is D
7 0
3 years ago
25/5 as a whole number
OLEGan [10]
25/5 would be 5 as a whole number
4 0
3 years ago
Read 2 more answers
Given two points on a line determine (a) the slope of the line using m=y^2-y^1/x^2-x^1 and (b) the equation of the line in y= mx
Anni [7]
(2,5) (3,-) do not quote me on it but I think that’s wrong
3 0
3 years ago
Read 2 more answers
What is the inverse of the function below?
timama [110]

Answer:

Step-by-step explanation:

The correct answer is A

8 0
3 years ago
Other questions:
  • Which expression is equivalent to 5.4+3.4w-1.8w +5.8 A) 7(1.6+w) B) 1.6(7+w) C) 1.6(7w) D) 1.6(0.25+w)
    11·1 answer
  • F(n)=2n-5 ;find f (-8)
    12·2 answers
  • Solve the Equation p+5/8=15/16?
    6·1 answer
  • A student was given the equation x^2+2x-16=0 to solve by completing the square. The first step that was written is shown below.
    15·1 answer
  • mobile phone battery life phone battery life (hours) a 20 b 25 c 10 d 18 if 8.45% of the battery life of each mobile phone is us
    8·1 answer
  • 3*10^-1/2*10^2 standard form
    5·1 answer
  • What is 3х – 18y = 4
    15·2 answers
  • Best Answer Gets Brainliest
    15·2 answers
  • Which is the solution for 3 (10x+4) = 8(3x + 6)
    5·2 answers
  • Bailey and Elena compete in a swim race. Their times are
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!