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
VMariaS [17]
3 years ago
8

Help me with it please with stepsclass 9 trigonometry ​

Mathematics
2 answers:
tiny-mole [99]3 years ago
6 0

secA=√2

secA=sec45

A=45°

3cos²45+5tan²45/ 4tan²A-sin²45

= 3(1/√3)²+5(1)² / 4(1)²-(1/√2)²

=3/2+5/4-1/2

=13/7

Andrew [12]3 years ago
6 0

Answer:

\frac{13}{7}

Step-by-step explanation:

Using the identities

cos x =\frac{1}{secx} , sin²x = 1 - cos²x

tan²x = sec²x - 1

Given

\frac{3cos^2A+5tan^2A}{4tan^2A-sin^2A}

= \frac{3(\frac{1}{sec^2A}+5(sec^2A-1) }{4(sec^2A -(1-cos^2A)}

= \frac{3.(\frac{1}{\sqrt{2})^2 } +5((\sqrt{2})^2-1) }{4((\sqrt{2})^2-1)-(1-(\frac{1}{\sqrt{2} })^2  }

= \frac{\frac{3}{2}+5(2-1) }{4(2-1)-(1-\frac{1}{2} )}

= \frac{\frac{3}{2} +5}{4-\frac{1}{2} }

= \frac{\frac{13}{2} }{\frac{7}{2} }

= \frac{13}{2} × \frac{2}{7}

= \frac{13}{7}

You might be interested in
What is the value for y?
Monica [59]
Im pretty sure it’s be 2
8 0
3 years ago
True or false? A theorem is a statement that can be easily proved by a collary
DedPeter [7]
It is TRUE that a corollary is a statement that can be easily proved using a theorem.
3 0
4 years ago
Read 2 more answers
(1) During a sale, a baseball team allows people to buy
balu736 [363]
33% is ur answer i took the quiz

8 0
4 years ago
2. Pi is the ratio of what two measures of a circle?
madam [21]

pi is the ratio of the 2 measures 1.5 of a circle.

8 0
3 years ago
Solve for x 5(x+1)-2x=2(3+x)
Kazeer [188]
5(x+1)-2x=2(3+x) —> factorise
5x+5-2x=6+2x —> - 3x
3x+5=6+2x —> -2x
x+5=6 —> -5
x=1
4 0
3 years ago
Other questions:
  • How to multiply matrices 3×3 by 3×3
    13·1 answer
  • Two lines that are perpendicular to each other form 4 right angles. true or false?
    9·2 answers
  • How to solve this problem im not getting a good answer
    9·2 answers
  • Each notebook contains 60 sheets of paper. Andre has 5 notebooks. How many sheets of paper do Andre's notebooks contain?
    8·2 answers
  • A nutritionist’s client records his weekly caloric intake. Which type of graph would be best for displaying data so that the nut
    8·1 answer
  • –20, - 12,5, 22, . . .<br> An=<br> A50=
    13·1 answer
  • Which is the greatest common factor of 84 and 60?
    10·1 answer
  • Find the volume of the following
    11·1 answer
  • FREEEEEEEE POINTSSSSS!!!!!!!! :):):):):):):):)
    10·2 answers
  • 4x +5 =x+8 please show work
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!