MATHEMATICS MIDDLE SCHOOL

(k) 1 + tan 4A . tan 2A = sec 4A.Please help me.... question from multiple angle of trigonometry!!!!!​
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Answers

Answer 1
Answer:

proved...

Step-by-step explanation:

this is too easy method to solve this problem

Answer 2
Answer:

it was a long proof...

follow the caption and steps and you'll understand it

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HELP ME PLEASE :D :D

Answers

Make proportions and reduce them.
6/9=2/3
10/15=2/3
The two rectangles are similar proportionally with a ratio of 2:3.

Does that answer your question?

Find the measure of an angle complementary to 30

Answers

complementary angles add up to 90.

Given that A = (9,9,2), B = (1,3,5) and C = (5,6,4), find the vector equation of the line through A and B.a.r=(8,6,-3)+t(9,9,2)
b.r=(9,9,2)+t(-8,-6,3)
c.r=(9,9,2)-t(-8,6,-3)
d.r=(9,9,2)-t(8,-6,3)

Answers

Answer:

It's not C

Step-by-step explanation:

Sorry bud I tried to help you out but i guessed wrong on my test, atleast its not C though:)

Answer:

The answer is B.r=(9,9,2)+t(-8,-6,3)

Step-by-step explanation:

Got it right on the quiz on Edge.

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Choose some numbers to compare to 55 use = and <,>

Answers

Answer:

The answer in the procedure

Step-by-step explanation:

The numbers are 30,55,80

Compare the numbers with  55

a) we know that

30 < 55 -----> the number is less than 55

b) we know that

55 = 55 -----> the number is equal to 55

c) we know that

80>55 -----> the number is greater than 55
50 55 and 60, that is the easiest answer that i could think of

If m BCD = 21° and mEF = 33°, determine MABD using the appropriate theorems and postulates.

Answers

m(ar ABD) = 54°

Solution:

The image of the question is attached below.

Given data:

m∠BCD = 21° and m(ar EF) = 33°

By central angle theorem,

The measure of a central angle is equal to the measure of the intercepted arc.

m (ar EF) = m∠ECF

m∠EFC = 33°

By vertical angle theorem,

If two lines are intersecting, then vertically opposite angles are equal.

⇒ m∠ACB = m∠ECF

⇒ m∠ACB = 33°

m∠ACD = m∠ACB + m∠BCD

              = 33° + 21°

m∠ACD = 54°

By central angle theorem,

m(ar ABD) = m∠ACD

m(ar ABD) = 54°

The price of a dress is reduced by 60%.When the dress still does not​ sell, it is reduced by 60% of the reduced price. If the price of the dress after both reductions is ​$72, what was the original​ price?The price of a dress is reduced by 25​%.When the dress still does not​ sell, it is reduced by 25​% of the reduced price. If the price of the dress after both reductions is ​$72, what was the original​ price?

Answers

Answer:

1. $450

2. $128

Step-by-step explanation:

1. new price = .4 (.4 * original price x)

72 = .16x

x = 450

2. new price = .75 (.75 * original price x)

72 = .5625x

x = 128
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