Q. The angle θ1 is located in QuadrantI, and cos(θ1)=1710.What is the value of sin(θ1) ?Express your answer exactly.sin(θ1)=
Use Pythagorean Identity: We know that cos(θ1)=1710. To find sin(θ1), we use the Pythagorean identity sin2(θ1)+cos2(θ1)=1.Substitute cos(θ1)=1710 into the identity.sin2(θ1)+(1710)2=1.
Simplify and Calculate sin(θ1): Simplify (1710)2 and subtract it from 1 to find sin2(θ1). sin2(θ1)+289100=1. sin2(θ1)=1−289100. sin2(θ1)=289289−289100. sin2(θ1)=289189.
Take Square Root: Take the square root of both sides to find sin(θ1).sin(θ1)=±289189.Since θ1 is in Quadrant I, where sine is positive, we choose the positive root.sin(θ1)=289189.
Final Simplification: Simplify the square root of the fraction.sin(θ1)=289189.sin(θ1)=179⋅21.sin(θ1)=17321.
More problems from Find trigonometric ratios using multiple identities