Question

The cosine of the complimentary angle to 58° a. 0.74 c. 0.83 b. 0.85 d. 0.94

Answer 1

Option b is correct!

Explanation:

cosine of complimentary angle to 58 is

complimentary of 58 means = 90 -58 = 32 [ since sum of complimentary angles is 90 degrees ]

so its asking for cos (90-58) = cos 32 which equals 0.848 or 0.85

therefore option b ( 0.85 ) is correct!

Answer 2

the sum of complimentary angles equal 90°.

x + 58° = 90°

x = 32°

cos (32°) = 0.848

Answer: B

Note: you can also take sin (58°) to get the answer.