Wednesday

October 1, 2014

October 1, 2014

Posted by **VesaN** on Friday, May 7, 2010 at 12:35pm.

- equation trig -
**bobpursley**, Friday, May 7, 2010 at 3:18pmsquare both sides

cos^2 -2sin*cos + sin^2<1/4

1-sin(2x)<1/4

sin(2x)<-3/4

2x>131deg

x>65.5 deg

2x<311

x<155 check that with a graph.

- equation trig -
**VesaN**, Saturday, May 8, 2010 at 8:48amthnx

**Answer this Question**

**Related Questions**

Trig........ - I need to prove that the following is true. Thanks (cosx / 1-sinx...

Precalculus/Trig - I can't seem to prove these trig identities and would really ...

trigonometry - can i use factoring to simplify this trig identity? the problem ...

Pre-Calc - Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= ...

Trigonometry Check - Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [...

Math - Im really struggling with these proving identities problems can somebody ...

Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! ...

Pre-calc - prove the identity: (cosx)(tanx + sinx cotx)=sinx+cos(squared)x i ...

Math - Verify the identity . (cscX-cotX)^2=1-cosX/1+cosX _______ sorry i cant ...

Trig - #1 (1/sinx)(sin^2x + cos^2x(sinx/cosx) )/(sinx + cosx) = (sinx + cosx)/(...