Question: Without a calculator, evaluate 2 cos 40 + cos 140 + sin 230.

Without a calculator, evaluate 2 cos 40° + cos 140° + sin 230°.

Step by Step Solution

★★★★★

3.45 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock

We can use trigonometric identities and angle addition formulas to evaluate the expression First ... View full answer

blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Basic Technical Mathematics Questions!

Q:

A surface S2 consists of that part of the cylindrical surface z+y? = 9 that lies between the planes z=0 and z=2, and for which z> 0, as shown in Figure Q2. (a) Figure Q2.a on page 4 shows an attempt...

Q:

Evaluate sin x cos x dx by four methods: (a) The substitution u = cos x, (b) The substitution u = sin x, (c) The identity sin 2x = 2 sin x cos x, and (d) Integration by parts. Explain the different...

Q:

For the following exercise, evaluate the expression without using a calculator. Give the exact value. -(1) - V3 2 sin COS COS -(1/). 2 sin V2 2 - + sin cos (1) sin (0) + cos +-(-/-) (1) - 2

Q:

ANSWER THESE QUESTIONS ON FURTHER LOGARITHMS 7. Given that log 10 3 = x and log10 7 = y, Express log 1 63 log 10 147 in terms of x and y. (3mks) 8. Find x if 32x+3 + 1 = 28 (2 mks) 9 . If 19 ( )"...

Q:

3. Given that sin 45 = cos 45-0.707 when to 3 significant figures, find the value of a following without using a calculator (a) 2 cos 45 + 3 sin 135 (b) 3 cos 135+ 4 sin 135 (c) cos 135-2 sin 45

Q:

EX-13 A 2.00-m-tall basketball player is standing on the 1 Read the problem, draw a picture and chose reference frame. floor 10.0 m from the basket, as in the Figure. If he shoots x-comp the ball at...

Q:

Exercise Set 6.1: Sum and Difference Formulas Simplify each of the following expressions. 1. sin ( x ) 2. 3 cos x + 2 3. cos x 2 4. sin ( + x ) 5. sin 60 + sin 60 + 6. cos 60 + cos 60 + 7. cos x +...

Q:

All the information are in it (i) g(x) = x?(x + 5)%(x 1)(x 4) (a) Degree: ; Leading coefficient: ; based on this the end behavior is: (b) the x-intercepts: X-intercept Multiplicity Bounce or cross?...

Q:

O 32 20 3) Cos A Find the value of each trigonometric ratio as decimals rounded to the ten-thousandths place. 4) tan Z 8 Find the missing side. Round answers to the nearest tenth. show work i solve...

Q:

uiz 2 SHOW ALL WORK to receive credit. 1. 3 pts. Use the sum or difference identities to evaluate exactly (no decimal approximations): cos285 2. In questions 2A, 2B, 2C, and 2D below, find the exact...

Q:

Explain why ice floats. (brief explaination only)

Q:

En. Ereeman is a father of four children and his wife is working as a clerk. They are resident in Malaysia for the basis year 2020. One of their sons is studying in a university and the other three...

Q:

After completing a draft Profit and Loss Account for the year ended April 30, 2017 of ABC Limited, the following balances remained and a Suspense Account entry was required for the difference which...

Q:

What are three quality-related risk factors in construction?

Q:

The National Assessment of Educational Progress (U.S. Department of Education) tests mathematics, reading, and science achievement in grades 4 and 8. A random sample of states is selected, and their...

Q:

Use Table K to determine whether the null hypothesis should be rejected. w s = 13, n = 15, = 0.01, two-tailed

Q:

The median age at first marriage in 2014 for women was 27 yearsthe highest it has ever been. A random sample of womens ages (in years) from recently applied for marriage licenses resulted in the...

Q:

An investor is considering the purchase of a financial instrument that promises to make the following payments: This financial instrument is selling for $1,243.83. Assume that the investor wants a...

Q:

Marketing princeple thx a lot Pick one example product for TWO of the following Consumer Product types: Specialty products/services Shopping products/services Convenience products/services Unsought...

Q:

Indicate the effect on this period's Unlevered Cash Flow (UCF) of this change: A $450 increase in cash operating expenses. Assume there is a 22 percent tax rate, if applicable, and that nothing else...