Which expression does (sin x)(cos 2x) + (cos x)(sin 2x) simplify to?  cos 3x  −sin x  sin 3x  cos(−3x)

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: Simplify (cos(11t))+(cos(5t)/sin(11t)-sin(5t))

A:

Q: How does sin(2x + (pi/2)) equal cos(2x) ?

A:

Q: Find the value of cos (570)sin (510) + sin (- 330)cos (- 390)

A:

Q: Which expression does (cos 3x)(cos x) - (sin 3x) (sin x) simplify to? O cos 4x sin 2x O cos 2x sin…

A:

Q: Cos(10+x)

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

Q: Simplify. cos(-4x) · cos 2x – sin(-4x) · sin 2x cos(-2x_ sin(-6x) cos(-3x) cos(-x)

A: Using Cos(A+B) formula

Q: Which expression does (sin x)(cos 2x) + (cos x)(sin 2x) simplify to? O cos 3x O-sin x sin 3x O…

A: To simplify the expression

Q: What are the differences between cosx and cos ¹x

A:

Q: (7cosx-sinx)2 + (cosx+7sinx)2 = 50 Verify the identity.

A: Given,

Q: Evaluate cos-1 (2+3i).

A: I am going to solve the given problem by using some simple trigonometry to get the required result…

Q: Rewrite cos ( x –) in terms of sin(x) and cos(x) 3

A: we know that cos(x-y)=cos(x)cos(y)+sin(x)sin(y)

Q: rewrite cos(x+4pi/3) in terms of sin(x) and cos(x)

A:

Q: sin(u) cos(u) - cos³(u)

A:

Q: Simplify cos²(4y) - sin²(4y)

A: