Question

plz help: the expression sin(theata+90) is equivalent to?

Answer 1

cos theta

Answer 2

how do u no tho?

Answer 3

@AccessDenied canu plz help me

Answer 4

@cwrw238

Answer 5

@Koikkara

Answer 6

@Kilorion

Answer 7

@hoblos

Answer 8

@beccaboo333

Answer 9

@Loser66

Answer 10

ok?

Answer 11

canu plz explain it more?

Answer 12

no I m sorry, it's cos theta

Answer 13

canu help me with another ques plz?

Answer 14

sin (a+ b) = sina cos b + sinb cos a
your a = 90 , your b = theta
so that
sin (90 + theta) = sin 90 cos theta + sin theta cos 90
sin 90 =1, cos 90 = 0
so that sin (90+ theta ) = 1* cos theta + sin theta *0= cos theta

Answer 15

I have class right now, cannot help you more. I am sorry, but I can give you the answer if the problem is easy, hurry up

Answer 16

: the expression cos4x cos3x+sin4x sin3x is equivalent to?

Answer 17

cos x
because cos (a-b) = cos a cos b + sina sinb
your a is 4x, your b is 3x, so that cos (4x-3x) = cos x

Answer 18

gtg, good luck

Answer 19

thnks so much ur awesome