Question

Please help me with this problem

Answer 1

Answer:

1

Step-by-step explanation:

sin x = ½

x = π/6 = 30°

then

cos (x -π/6) = cos 0° = 1

Answer 2

Answer:

1

Explanation:

According to the Unit Circle, sin π\6 is ½, so we plug this into the cosine function to get this:

cos π\6 - π\6 → cos 0 >> 1

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** I do not have Unit Circle video uploaded yet, but if I need to, just notify me in the comments or on of course, You-Tube.

*** Plus, we need to make sure that the x-value falls in between 0 and π\2, which it did, so no need to worry.