It's precalc!!! The Pythagorean identity. Value of sin(θ1)?
1 answer:
Answer:
sqrt(217)/19
Step-by-step explanation:
sin²(theta) = 1 - cos²(theta)
= 1 - (-12/19)²
sin²(theta) = 217/361
sine is positive in quadrant 2
Take the positive root
sin(theta) = sqrt(217)/19
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