B. Use the sine and cosine values of special angles to find the sum: sin30+cos60.

Question

Mathematics

Mara Branch

9 September, 00:43

B. Use the sine and cosine values of special angles to find the sum: sin30+cos60.

+1

Answers (1)

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Kailyn Houston · Answer 1

sin30+cos60 = 1.

Step-by-step explanation:

Use the right angles triangle with angles 90-8=60-30.

The hypotenuse = 2 and the 2 legs have values of 1 and √3.

The 30 degree angle is opposite the leg of measure 1.

sin 30 = opposite / hypotenuse 1/2 and cos 60 = adjacent / hypotenuse 1/2 so the sum is 1.