Find the expression that is equivalent to sin 70° cos 30° + cos 70° sin 30°...
Find the exact value of the expression. sin (30) sin(90°) - cos (30) cos(90°) = Find the exact value of the expression. sin( – 45° ) sin( - 30°) = [ Write each expression as a single trigonometric function. sin(7x)cos(3x) – cos(7:c )sin(32) = Write each expression as a single trigonometric function. cos(6.c )cos(3x) - sin(62) sin(30) = Write each expression as a single trigonometric function. cos(7x)cos (4:0) + sin(78) sin(4x) =
1 point Select the correct answer. The expression cos(45° – 2) + sin(60° + x) is equivalent to O V3 2 ) COS 2 + sina sini ( (+)+(-3) ( 54)+G+) ( 1 sin 3 O v3 COS + V2 2 + sin 3 Previous
Find sin 105° first using a difference identity and then using a half-angle identity. Then compare the results. Which expression is a difference identity applied to sin 105°? Choose the correct answer. O A. sin 135º cos 30° + cos 135° sin 30° OB. sin 135° sin 30° - cos 135º cos 30° O c. sin 135° sin 30° + cos 135º cos 30° OD. sin 135ºcos 30° - cos 135º sin 30°
ecos (20) cos e Establish the identity cos + cos (30) sin 0+ sin (30) cot (20) Choose the correct sequence of steps to establish the identity cos 0 + cos (30) 2 cos (20) cos (20) OA sin 0+ sin (30) cot (20) 2 cos (20) sin (20) B. cos 0 + cos (30) sin 0 + sin (30) = 2 sin (20) cos e = cot (20) Ос. = cos 0 + cos (30) 2 sin cos (20)...
Find the exact value of the expression cos(sin If sin = sin 2 15 find the exact value of cos(20) Solve sin 2x = cos 2x, where 0 <x<21.
Find a cofunction with the same value as the given expression. sin 33° Select the correct choice below and fill in the answer box to complete your choic (Simplify your answer. Type any angle measures in degrees. Do not include the 0 O A. sin 33° = cot O B. sin 33° = CSC 0 O C. sin 33° = sec o OD. sin 33° = cos O E. sin 33° = tan 0
5. (12pts) Find the exact value of the given expression in radians. a. sin-(sin b. cos-(cos
Multiply and leave the answer in trigonometric notation. 6.5( cos 34° + i sin 34°)•5.5( cos 27° + i sin 27°). 6.5( cos 34° + i sin 34°)•5.5( cos 27° + i sin 27°)= (Type integers or decimals.) (cos 1° + i sin º) Find standard notation, a +bi. 6( cos (120°) + i sin (120°)) 6( cos (120°) + i sin (120°)) = (Type your answer in the form a + bi. Type an exact answer, using radicals as...
Write the expression as a single function of a. cos (90° - a) Choose the correct function for cos (90° - «). O A. cos a OB. - sin a O c. sin a OD - COS a
(1 point) Find A, B, C, and o if 30 cos(100t – 158°) - 50 sin(100t + 135°) = A cos(100t) + B sin(100+) = C cos(100t+)