Saturday

September 20, 2014

September 20, 2014

Posted by **John** on Thursday, March 5, 2009 at 8:09pm.

and sin t -3/5

s is in QIII

t is in QIV

find tan (s-t)

i got that tan (s-t)= 56/53

is that right? can someone check my work?

- TRIG -
**drwls**, Thursday, March 5, 2009 at 11:58pmIf sin s = -5/13, and it is in the third quadrant, cos s = -12/13

s = 202.620 degrees

If sin t is -3/5, and t is in the fourth quadrant, cos t = 4/5.

t = 323.130 degrees

tan (s-t) = sin (s-t)/cos(s-t)

= [sin s cos t - sin t cos s]/

[cos s cos t + sin s sin t]

Crunch the numbers. You should get a rational fraction, but your 53 in the denominator looks fishy.

You answer should be 56/33.

**Answer this Question**

**Related Questions**

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

trig - If sin A= 1/4 and sin B= -1/2, with A in QII and B in QIV, find tan(A+B)

Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...

precalculus - For each of the following determine whether or not it is an ...

Trigonometry - Please review and tell me if i did something wrong. Find the ...

trig 26 - simplify to a constant or trig func. 1. sec ²u-tan ²u/cos ²v+sin ²v ...

Maths Calculus Derivatives - Find the first derivative for the following ...

MathsSs triG - Consider sin(x-360)sin(90-x)tan(-x)/cos(90+x) 1.A.SIMPLIFY sin(x-...

Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...

TRIG - what is another form of: sin (A+B) sin (A-B)/ cos^2 A cos^2 B a) cos^2 A...