Question

cos x +1=sinx....solve the equation

Answer 1

Try squaring both sides.
Note than sinx^2 + cosx^2 = 1

Answer 2

try using additon formula with cosx+1-sinx=0

Answer 3

cosx +1 =sinx
cosx-sinx=1
Squaring both sides gives,
cos^2x - 2cosx sinx +sin^2x=1
1-2cosxsinx=0
2sinx cosx = 0
sinx cosx =0

Either sinx =0 OR cosx=0

Now, solve these and find all the values of x in the range you need... also check for all the values of x whether they are constient with the given equation or not as we have squared which would give incorrect solutions also.

Answer 4

it should be cosx-sinx=-1

Answer 5

oh yess...... but that makes no difference

Answer 6

yea

Answer 7

i would have done it a different way

Answer 8

but much easier

Answer 9

you can post it

Answer 10

i mean urs is much easier

Answer 11

Did u convert sinx-cosx into Rsin(x+A)
I mean this method ???

Answer 12

yea not sin , cos

Answer 13

ohh i see .. thanks guys