Name the x-values for which the sine function and the cosine function equal to zero simultaneously in the domain 0°

Question

Name the x-values for which the sine function and the cosine function equal to zero simultaneously in the domain 0°< x < 360°

vera_ewing · Answer

@amistre64 is the work for this one the same as the last question i asked?

amistre64 · Answer

not quite, but its a similar logic;  we say that sin(x) and cos(x) are equal to each other for the same value of x in ONLY 2 places ....

vera_ewing · Answer

which two places? and they both have to equal 0?

amistre64 · Answer

so, if sin(x) = 0  and cos(x) = 0  for some x;  then the only way that would be possible is if sin(45) = 0   or   sin(225)=0.  does this work for us?

vera_ewing · Answer

yes it works

vera_ewing · Answer

@amistre64 it works, right?

vera_ewing · Answer

@undeadknight26 can you help with this one? please?

amistre64 · Answer

what is the value of sin(45)?

vera_ewing · Answer

0?

amistre64 · Answer

what values of sin(x) get us a zero?
what values of cos(x) get us a zero?


are those values the same values for both sin and cos?

vera_ewing · Answer

well i guess sin(0) and cos(0) would get us 0

vera_ewing · Answer

@amistre64

amistre64 · Answer

cos(0) is not equal to 0,  you need to review your course material

amistre64 · Answer

sin(45) is not equal to 0 .... a review may be a good idea

vera_ewing · Answer

@amistre64 yeah i don't really understand most of this stuff. what does sin(45) equal?