Question

sin x = cos 15 + cos 75

Answer 1

are you allowed a calculator?

Answer 2

I need formulas to go from cos to sin

Answer 3

cos a + cos b = 2 cos ((a+b)/2) cos ((a-b)/2)

Answer 4

well you could just sin^-1 the whole thing, that's the easy way

Answer 5

cos(theta)= sin (90-theta)
so cos 15=sin 75

Answer 6

or use @shubhamsrg idea or @gorvs

Answer 7

@DMNTS follow me

Answer 8

I prefer @gorvs

Answer 9

now sinx= sin75+cos75
divide and multiply right side by\[\sqrt{2}\]

Answer 10

sinx=\[\sin x=\sqrt{2}*(1/\sqrt{2}*\sin 75+1/\sqrt{2}*\cos75)\]

Answer 11

1/\[1/\sqrt{2}=\sin 45 = \cos 45\]

Answer 12

\[sinx= \sin75*\cos45+\sin45*\cos75\]

Answer 13

sry root 2 is also there in multiplication

Answer 14

Thnx, now I know how to go from here

Answer 15

\[\sin x=\sqrt{2}* \sin(75+45)\]

Answer 16

@DMNTS okkk buddy