SHORT ANSWER. Write the werd ar MULTIPLE CHOICE, Choose the one altermative that
ID: 2913120 • Letter: S
Question
SHORT ANSWER. Write the werd ar MULTIPLE CHOICE, Choose the one altermative that best completes the stasement or anwers the g Use a halt-angle formala to find the exact value of the expressien Use the siven information to find the exact valee of the trigonometric function 153 15)sino÷ ones in quadrant l Find an Express the product as a sum or difference 16) sin ix cos 3x B) (sin 9x + cis 3x) C) sin (cos Tx2) statement or answers the question HORT ANSWER. Write the word or phrase that best completes each ind all solutions of the equation. 17) 1) 2 cosx3Explanation / Answer
13) cos theta = 15/17
sin theta = - 8/17
sin 2 tehta = 2 sin theta cos theta
= 2 ( -8/17 ) ( 15/17 )
= -240/289
15) sin theta = 1/4
cos theta = sqrt 15 / 4
sin tehta /2 = sqrt ( 1 - cos theta ) / 2
= sqrt ( 1 - sqrt 15 / 4 ) / 2
= sqrt ( 4 - sqrt 15 ) / 4
= sqrt [ 8 - sqrt 15 ] / 4
option c is correct
16) sin 6x cos 3x
applying product to sum formula
sin a cos b = 1/2 [sin ( a + b ) + sin (a - b ) ]
= 1/2 [ sin 9x + sin 3x ]
option d is correct
17) 2 cos x + sqrt 3 = 0
2 cos x = - sqrt 3
cos x = - sqrt 3/2
x = 5pi/6 + 2 npi , 7pi/6 + 2 npi
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.