Question

If cos (A+35) = 1/2, find A.​

Answer 1

Answer:

25 degrees

Step-by-step explanation:

sin 30 is 1/2 (because in a 30, 60, 90 triangle, the opposite side of the angle 30 divided by the hypotenuse is always 1/2), so cos(90-30) has to equal the same as sin 30. 90-30 is 60, and 60-35 is 25 degrees.

Answer 2

Answer:

Cos(A +35) = 1/2

cos ( A+35 ) = cos45

A + 35= 45

A = 45-35

A = 10.

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