Express the product as a sum containing only sines or cosines. sin (30) cos (40) O A. 1 2[cos (70) - cos 0] O B. B. cos² (120²) 2 O C. 1 O D. 1 2 [sin (70)- sin 0] [cos (70) + sin 0]

Q: COS (+3 O cos x Ocos 2x O sin a Ocos z +x) + cos (-) is equivalent to:

A:

Q: Which expression is equal to cos(6t)?

A: Recall:  cos(2t)=cos2(t)-sin2(t)     Given,   cos(6t)

Q: r=2(9+1)sin0

A: Since  Sin (0) = 0

Q: 5 sin a -3 cos a If 5 tan a = 4, Show that 5 sin a +2 cos a 116

A: Given: 5 tanα=4

Q: epresent 3 sin x + 6 cos x in a form A sin(x + p), use radians for p.

A:

Q: Evaluate / cos(a0)d0 where a is a real number, and C is an arbitrary constant. sin(æ0) + C O a…

A: Solution-

Q: Express the product sin 7x cos 3x as a sum or difference.

A: Given information: The given expression is sin7xcos3x. Concept used: 2sinAsinB=sinA+B+sinA-B…

Q: Cos(10+x)

A: Here , We will apply the formula of Cos ( A+B) Cos(A+B) = [CosA CosB - SinA SinB ]

Q: Convert the value (1110111.010)2 to decimal O a. 119.25 Ob. 118.25 C. 119.75 Od. 118.875

A: Binary to decimal conversion

Q: cos3(50) sin(50) de

A: To determine the integral.

Q: 1/2 sin e cos (cos a cosec 0) de TC (1-cos a).

A: Note that we have to show that the integral value is  π2(1 - cosα).

Q: expand the formula for sin(A+B)

A:

Q: sin x − 1 = cos x − 1

A:

Q: cos3θ+cos4θ=0.

A: Consider the given equation, cos3θ+cos4θ=0 By using the formula, cos(a + b) + cos(a - b) =…

Q: sin(cos (0.715)) O 2.6991 O -1.3009 O -0.3009 O 1.6991 O 0.6991

A: Given,               sin(cos-1(0.715))

Q: 2 sin²a - 1 sin a + COS a

A: This is the required solution for your problem.Explanation:For any query with the solution, please…

Q: cos (0+ 90)

A: Given: cos0+90