Math Is Fun Forum

helloying

Member

Registered: 2008-02-16

Posts: 4

Help me with the triginometry question!!!:(

12 cos x - 5 sin x = R cos (x + θ )
I got the answer already which is 13 cos (x + 22.6° )

The question is (12 cos x - 5 sin x)²

Find the max. and min. value and sovle x that satify the range of 0°  to 360°

ZHero

Real Member

Registered: 2008-06-08

Posts: 1,889

Re: Help me with the triginometry question!!!:(

now use

or

for maximum and

  for  minimum

Last edited by ZHero (2008-07-27 20:28:08)

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