WebUse a half-angle formula to find the exact value of the following expression. tan 112.5° Determine an appropriate half-angle formula for sine and the measure of the angle. Select the correct choice below and fill in the answer box to complete your choice. WebUse an appropriate Half-Angle Formula to find the exact value of the expression. tan (22.5°) 5 Points] DETAILS SPRECALC7 7.3.021. Use an appropriate Half-Angle Formula to find the exact value of the expression. cos (1659) -/5 Points] DETAILS SPRECALC7 7.3.023. Use an appropriate Half-Angle Formula to find the exact value of the expression. tan (0)
Solved Use a half-angle formula to find the exact value of - Chegg
WebNov 9, 2015 · Explanation: Call tan (112.5) = tan x. tan 2x = tan (225) = tan (45 + 180) = tan 45 = 1 Apply the trig identity: tan2x = 2tanx 1 − tan2x, we get: 1 = 2tanx 1 − tan2x 1 − tan2x = 2tanx. Solve the quadratic equation: tan2x +2tanx − 1 = 0 D = d2 = b2 − 4ac = 4 + 4 = 8 --> d = ± 2√2 Ther3 are 2 real roots: tanx = − 2 2 ± 2 √2 2 = − 1 ± √2. WebNov 9, 2015 · Explanation: Call tan (112.5) = tan x. tan 2x = tan (225) = tan (45 + 180) = tan 45 = 1 Apply the trig identity: tan2x = 2tanx 1 − tan2x, we get: 1 = 2tanx 1 − tan2x 1 − tan2x … glow by daye deep conditioning heat cap
Answered: Use the Half-angle Formulas to find the… bartleby
WebMay 25, 2015 · Use trig identity: 2sin^2 a = 1 - cos 2a cos2(112,5) = cos225 = cos(45 +180) = − cos45 = − √2 2 2sin2112.5 = 1 + √2 2 = 2 +√2 2 sin2112.5 = 2 + √2 4 = 0.85 sin112.5 = √2 + √2 2 The negative answer is rejected because sin 112.5 is positive. Check with calculator: sin 112.5 = 0.92 OK Answer link WebFind the Exact Value cos (112.5) cos (112.5) cos ( 112.5) Rewrite 112.5 112.5 as an angle where the values of the six trigonometric functions are known divided by 2 2. cos(225 2) cos ( 225 2) Apply the cosine half - angle identity cos( x 2) = ±√ 1+cos(x) 2 cos ( x 2) = ± 1 + cos ( x) 2. ±√ 1+cos(225) 2 ± 1 + cos ( 225) 2 WebAnswer to: Use a half-angle formula to find the exact value of the expression. sin 75 degrees. By signing up, you'll get thousands of step-by-step... boil flaxseed in microwave