Monday

January 26, 2015

January 26, 2015

Posted by **Anonymous** on Monday, December 5, 2011 at 5:27pm.

- trig -
**bobpursley**, Monday, December 5, 2011 at 5:32pmsquare both sides.

4sin^2= 1-2cos+cos^2

4(1-cos^2)=1-2cos+cos^2

now, gather terms, it is a quadratic, solve using the quadratic equation.

- trig -
**Anonymous**, Monday, December 5, 2011 at 6:18pmokay so i got -(3/5) and 1, i am supposed to find the solutions in the interval from 0degrees to 360degrees

- trig -
**piyush yadav**, Tuesday, December 6, 2011 at 1:27amthe previous ans. is wrong as if we sq. the eqn. it generates false solutions a better method is to divide coefficients of sin and cos by root of sq. of coeff.ofsin+sq. of coeff of cos . that is main pt. remaining we will proceed by making it an argument in cos . and then make general sol. and find no. of sol. or diff solutions by putting value of n in general solution

- trig -
**piyush yadav**, Tuesday, December 6, 2011 at 1:29amthe previous ans. is wrong as if we sq. the eqn. it generates false solutions a better method is to divide coefficients of sin and cos by root of( sq. of coeff.ofsin+sq. of coeff of cos) . that is main pt. remaining we will proceed by making it an argument in cos . and then make general sol. and find no. of sol. or diff solutions by putting value of n in general solution

**Answer this Question**

**Related Questions**

trig - Find all the solutions of 2 sinx=1-cosx in the interval from 0 ≤x&...

Trigonometry - Solve for x in the interval 0<=x<360: 1. 2sin2x+cosx =0 2. ...

trig - Solve for [0, 360) 2sinxcosx + cosx =0 2sinxcosx = -cosx 2sinx = -cosx/...

mathematics - Find all the solutions of 2 sinx=1-cosx in the interval from 0 &#...

Math - Trig - I need to find the solutions in the interval [0, 2pi for: 2sinx + ...

Trig (Last URGENT) - sin2x+cosx=0 , [-180,180) = 2sinxcosx+cosx=0 = cosx(2sinx+1...

maths - hey, i would really appreciate some help solving for x when: sin2x=cosx ...

trig - Find all solutions in the interval [0,360) sin(4t)=3/2

trig - Find all solutions of the equation 2sin^2x-cosx=1 in the interval [0,2pi...

identities trig? - find all solutions to the equation in the interval [0,2pie] ...