Question

Given that sin pie/6 = 1/2, use an equivalent trigonometric expression to show that cos= 1/2. I have no clue how to do this, can someone help me?

Answer 1

@sabika13

Answer 2

sin 30*=1/2
cos60*=1/2
u can see trignometric table for this and all for all values also

Answer 3

i dont understand.. can you do it step by step

Answer 4

If cos x = 1/2
then x = cos^(-1) (1/2)
therefore, x = 60 degrees , 300 degrees {where x is greater than or equal to 0 and lesser than or equal to 360}

or pi/3 radians, 5pi/3 radians {where x is greater than or equal to 0 and lesser than or equal to 2pi}

Answer 5

okay.. so we do not need to use trigonometric identities?

Answer 6

the trig identities chart*

Answer 7

is it ok?now or not?

Answer 8

i think its okay.. i basically just solve sinx and cosx?

Answer 9

which grade r u in?

Answer 10

122

Answer 11

sorry 12*

Answer 12

o Zbrdst

Answer 13

thank u for yourhelp.