:Question

if and ;

and

Find

a)tan(x+y)

b)tan(x-y)

c) the quadrant containing (x-y)

d)the quadrant containing (x+y)

Attempt:

Using the formula

a)

b)

c)1st quadrant

d)1st quadrant

Is my attempt Correct?

Thank you

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- Feb 28th 2009, 10:35 AMmj.alawamiSolving sum and difference identities
:**Question**

if and ;

and

Find

a)tan(x+y)

b)tan(x-y)

c) the quadrant containing (x-y)

d)the quadrant containing (x+y)

Attempt:

Using the formula

a)

b)

c)1st quadrant

d)1st quadrant

Is my attempt Correct?

Thank you - Feb 28th 2009, 10:57 AMskeeter
- Feb 28th 2009, 11:03 AMmj.alawami
Ooh I am very sorry I misread the question properly

and it is in the first quadrant (0<x<[tex]\frac{\pi}{2});

and it is in the first quadrant (0<y<[tex]\frac{\pi}{2})

Find

a) tan(x+y)

b)tan (x-y)

c) the quadrant containing (x-y)

d)the quadrant containing (x+y)

Attempt:

a)

b)

c)1st quadrant

d)2nd quadrant/4th not sure - Feb 28th 2009, 12:52 PMskeeter