Engineering Board Exam Reviewer · Trigonometric Identities · medium

Evaluate: 20° 10°+ 20° 10°.

1. 1/2
2. sqrt(3)2 0.866
3. sqrt(2)2 0.707
4. 1/4

Answer

A. 1/2

Solution

This is (20°+10°)= 30°= 12.

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