taburcour5Walt taburcour5Walt

09-12-2016
Mathematics

contestada

if sin theta =1/4, theta in quadrant II, find the exact value of cos[theta +pi/6]

Respuesta :

Aliwohaish12 Aliwohaish12

09-12-2016

Using cos addition formula:
use x for theta
cos(x+π/6)=cosx*cos(π/6)-sinx*sin(π/6)
sinx=1/4
cosx=√15/4
cos(π/6)=√3/2
sin(π/6)=1/2
cos(x+π/6)=(√15/4*√3/2)-(1/4*1/2)
cos(x+π/6)=(√45/8)-(1/8 )
cos(x+π/6)=(√45-1)/8)

Answer Link

Otras preguntas

Identifying and Classifying Balance Sheet and Income Statement Accounts Following are selected accounts for Staples, Inc., for the fiscal year ended January 3,

i need help with these questions for chemistry please

Please help me with this thanks

You are a security consultant and have been hired to evaluate an organization's physical security practices. All employees must pass through a locked door to en

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

how do you use distributive property on an equasion like -2 (-6x+ 3y - 1 )

HELPPPPP PLSSSSSSS pls

What is photosynthesis? Please give me verified answer.

Those who argue that objectivity is impossible are known as activitists. O True O False ASAP AND THANK YOU

In the seven stages ages of man the man who is full of wise saws is the