Question

What are the sine, cosine, and tangent of 5 pi over 4 radians?

Answer 1

@hartnn @zaibali.qasmi

Answer 2

see 1st convert it into degree form..it will be more easy to solve for you..


so

5*180/4=900/4=225

now
225=180+45

so use
sin(180+45)=sin180cos45+cos180sin45
cos(180+45)=cos180cos45+sin180sin45

and
tan(180+45)=\[\frac{ \tan180\tan45 }{ 1+\tan180\tan45 }\]

Answer 3

simply plug in values from table and get result///

Answer 4

? sorry im confused

Answer 5

so what?

Answer 6

@zaibali.qasmi i dont know how to do this...

Answer 7

sin180=0
sin45=1/sqrt2

cos180=-1
cos45=1/sqrt2

tan180=0
tan45=1

put these values and solve..

Answer 8

put them into what?