Mathematics

29.10.2020 05:23

330

Solved by an expert

The question is below

Show Answers

giiffnlojd

4,5(18 marks)

use sin to find the angle x

andrew194

4,7(46 marks)

We can use the triginotemtric ratio inverse cos to solve this problem.

Cos=adjacent side/hypotenuse

cos(h)=21/69

$cos^-1(21/69)=x\\cos^-1(0.30434782608) \\x=72$

Step-by-step explanation:

warrior4516

4,7(76 marks)

$16x^2-8x+1=4^2x^2-2\cdot4x\cdot1+1^2=(4x)^2-2\cdot4x\cdot1+1^2\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=(4x-1)^2=(4x-1)(4x-1)$

New questions by subject

If atmospheric pressure suddenly changes from 1.00 atm to 0.900 atm0.900...

If atmospheric pressure suddenly changes from 1.00 atm to 0.900 atm0.900 atm at 298 K, how much oxygen will be released from 4.40 L4.40 L of water in an unsealed container...

Chemistry

07.04.2021 11:38

True or false: One of the ways to identify an error if the trial...

True or false: One of the ways to identify an error if the trial balance does not balance is to check that the correct account balances were transferred to the correct...

Business

29.10.2022 07:07

Should the U.S. have the right to Police the entire Western Hemisphere?...

History

01.04.2023 14:13

Which of the functions below could have created this graph?...

Mathematics

09.09.2021 04:37

Determine the 95% confidence interval for the difference of the sample...

Determine the 95% confidence interval for the difference of the sample means. Then complete the statements ts The 95% confidence interval is to the 95% confidence The...

Mathematics

20.05.2021 13:30

The degree of the polynomial function f (x) is 4. The roots of the...

The degree of the polynomial function f (x) is 4. The roots of the equation f (x) = 0 are -6, -2, 1, and 3. Which graph could be the graph of f (x)?...

Mathematics

22.06.2022 19:08

An experiment is defined as a Group of answer choices self-correcting...

An experiment is defined as a Group of answer choices self-correcting process for asking questions and observing nature s answers. measure of the extent to which two...

Social Studies

24.04.2023 09:30

Kent and Kirsten are both trying to clear their consumer debts. Kent...

Kent and Kirsten are both trying to clear their consumer debts. Kent devises a strategy to clear her debts by first freezing her credit card, then paying the highest-interest...

Business

15.01.2023 09:34

Which sociological perspective(s) believes that the most powerful...

Which sociological perspective(s) believes that the most powerful groups and institutions control wealth, property, and the means of producing beliefs about reality through...

Social Studies

25.07.2022 07:16

a particular person in america uses 311.0gallons of water in a given...

a particular person in america uses 311.0gallons of water in a given day. How many liters of water is this...

Mathematics

11.09.2021 19:25

The question is below

Popular Questions about the subject: Mathematics

New questions by subject

We expand our knowledge with many expert answers