Ask
your own question, for FREE!

Mathematics
71 Online

OpenStudy (anonymous):

a) Given that cos x = sqrt3 - 1 find the value of cos 2x in the form a+b sqrt3 where a and b are integers b)Given that 2 cos(y+30) = sqrt 3 sin(y-30) find the value of k sqrt3

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (anonymous):

a) \[ x = \sqrt{3} - 1\] b) \[ 2cos(y+30) = \sqrt{3} sin (y-30)\]

OpenStudy (anonymous):

find tan in the form \[k \sqrt{3}\]

OpenStudy (anonymous):

cos2x = cos^2 x-sin^2 x = 2 cos^2 x - 1 Cosx=root3 -1, cos^2 x= 3-2root3+1 = 4-2root3, 2cos^2 x -1 = 7-4root3

OpenStudy (anonymous):

I'd answer the other one but I have to leave.

Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!

Join our real-time social learning platform and learn together with your friends!

Latest Questions

sh2ah00d6:
3. For basketball fans, a flexible light source that can be attached around any basketball hoop rim has been developed.

1 hour ago
0 Replies
0 Medals

Alreem7:
Which of the following does no affect the frictional form? a.weight of the object b.

3 hours ago
2 Replies
1 Medal

Alreem7:
A car is moving on horizontal road with a constant velocity.What is the net force acting on the object? a.

3 hours ago
2 Replies
3 Medals

alphaXtiger:
how is my story so far STALKER I am walking with my friend at night and I swear i see someone following me u201cBelladonna!u201dmy friend yells at me which

24 minutes ago
7 Replies
2 Medals