Math, asked by laiba1999, 11 months ago

cos 120 degree is?

Answers

Answered by brainlygeek

1

$\cos(120) = \: \cos(90 + 30) \\ \\ now \: \cos(90 +θ) = - \sin(θ) \\ \\ so \: \cos(90 + 30) = - \sin(30) = - \frac{1}{2} \\ \\$

Answered by rishu6845

4

Answer:

plzz give me brainliest ans and plzzzz follow me

Attachments:

Previous Question

Next Question

Similar questions

Geography, 5 months ago

ख. अन्तर्राष्ट्रीय तिथि रेखा क्या है?

English, 5 months ago

1. Set A is the set of days in a week. 2. Set B is the set of letters in the word "recognition". 3. Set C is the set of even numbers less than 2. 4. Set D is the set of odd numbers between 3 and 9. 5. Set E is the set of factors of 12.

Computer Science, 5 months ago

what is the need of study Green skills...

Math, 11 months ago

If a+b=5 and a-b=2 then find the value of a qube - b qube Attached-question 19...

Physics, 11 months ago

Define electric line of force and give its two important properties...

Chemistry, 1 year ago

The number of Faradays required to produce 0.5mol of free metal from Al³⁺ is (a) 3 (b) 2 (c) 6 (d) 1.5...

Chemistry, 1 year ago

The strongest oxidizing agent among the species In³⁺ (E° = -1.34V), Au³⁺ (E° = 1.4V), Hg²⁺ (E° = 0.86V), Cr³⁺ (E°=-0.74V) is (a) Cr³⁺ (b) Au³⁺ (c) Hg²⁺ (d) In³⁺...

Chemistry, 1 year ago

Which one of the following compounds dissolves in hot dilute sulphuric acid but does not reacts with sodium metal?(a) ethyl bromide (b) acetic acid(c) ethyl alcohol (d) diethyl ether...