Question

) Identify the correct step .


a) sin (105) cos60 cos45 sin 60 sin45

b)cos(105) cos60 cos45 sin 60 sin45

c) tan (105) cos100 cos5 sin100 sin5

d) all of the above​

Answer 1

Answer:

if option B is cos60cos45-sin60sin45then option B is correct

Step-by-step explanation:

cosAcosB-sinAsinB=cos(A+B)

cos60cos45-sin60sin45

=cos(60+45)

=cos105

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