kellerpaula kellerpaula

22-03-2020
Mathematics

contestada

Trigonometry
Angle Sum and Difference, Double Angle and Half Angle Formulas
Find the exact value of:
If sinx = 2/8, find Cos (1x)

Respuesta :

amna04352 amna04352

22-03-2020

Answer:

cosx = sqrt(15)/4, -sqrt(15)/4

Step-by-step explanation:

cos²x = 1 - sin²sin x

cos²x = 1 - (1/4)²

cos²x = 15/16

cosx = sqrt(15)/4, -sqrt(15)/4

Answer Link

Otras preguntas

Answer? Which one is it? 1 2 3 or 4

If the denominator is 10 and the numerator is 3, the fraction is

There's an old saying in Tennessee — I know it's in Texas, probably in Tennessee — that says, fool me once, shame on — shame on you. Fool me — you can't get foo

find the missing side of the triangle.

help with q25 please. Thanks.

The number of representatives for a state is always the same. The number of senators for a state depends on its and area.

Please show ALL YOUR WORK and how u came to the conclusion.

Denise needs to remind all 557 patients that the doctor's office won't be open on Fridays during the summer months. What's the most appropriate way to communic

Help ASAP Which scenario would best fit in a dystopian story? A. While working one night, the local librarian discovers a child with a wild and inventive imagi

Given sin = = V23 and tan o find cos 0. 23 11 ) 12 ? COS 0 = TO