xjwill102p3mpp3 xjwill102p3mpp3

04-02-2018
Mathematics

contestada

How do I do this?

Express the following as trigonometric ratios of either 30, 45 or 60 degrees and hence find their exact values

A) sin120
B) cos225
C) tan390

Respuesta :

Аноним Аноним

04-02-2018

A sin120 = 2 sin60 cos 60 = 2 * sqrt3/2 * 1/2 = sqrt3/2

B. cos 225 = - cos 45 = - 1 / sqrt2

C tan 390 = tan 30 = 1 / sqrt3

Answer Link

Otras preguntas

PLEASE HELP. CHEMISTRY QUESTION IS HARD FOR ME TO ANSWER. Chlorine dioxide, ClO2, has been used as a disinfectant in air conditioning systems. It reacts with wa

why is a small hole gauge sometimes referred to as a transfer gauge?

Let n be a positive integer. Prove that there exists a positive integer m > 1000 with the following two properties: m's last 3 digits are 007, and m is relat

Which statement is FALSE regarding ketone bodies? a) Ketone bodies can be used as a carbon source for fatty acid synthesis. b) Excess acetone production durin

A piece of paper looks white in both the noonday sun and under moonlight, even though there is less light being reflected off the paper under moonlight. This fo

How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee from 95.0ºC to 45.0ºC? You may assume the coffee has the sa

If the probability of losing is 7 10 what is the probability of winning?

Thomas Kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. Thomas's fastest-moving in

Bee-In-The-Bonnet Company purchased office supplies costing $8,000 and debited Office Supplies for the full amount. At the end of the accounting period, a physi

A = big apples; R = red apples; a = small apples; r = yellow apples. You have one tree that produces big yellow apples and another tree that produces small red