Please solve  Prove cos 4x = 8 cos4x − 8 cos2x + 1.

Q: 2 1 + cos2x can be simplified to: O sin²x O csc² x O cos²x O sec² x

A:

Q: tan2x(1+cos2x)=1-cos2x. Verify the identity

A: To verify the equation

Q: I+ Sin2X t Cos 2x COSX

A: Given,           1+sin2x+cos2xcosx

Q: Now, simplify 4 cos² ß − 4(1 − cos² ß) by combining similar terms. 4 cos² ß - 4(1- cos² B) В = 4…

A: We have to simplify the given trigonometric equation.

Q: Verify identity cos2 x - sin2 x = 2 cos2 x - 1.

A: cos2x -sin2x=2cos2x-1

Q: show that the equation cos2x(tan2 2x+ 3)+3=0 can be expressed as  2cos2 2x + 3cos2x+1=0

A: show that the equation cos2x(tan2 2x+ 3)+3=0 can be expressed as  2cos2 2x + 3cos2x+1=0

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

A: Given,

Q: 1+cos4x 1. 1-cos4x -csc2xdx

A:

Q: - Find all solutions for 4 cos x+V3 = 2 cos x if 0<x<2n. %3D

A:

Q: Simplify 1+cos8theta/2

A: Given trigonometric expression is: 1+cos8θ2 We have to simplify this expression.

Q: Evaluate 3 L, cos¹ (2+1) dr. -1

A: l have given the answer in the next step. Hope you understand that

Q: Find the quotient when 20(cos 75 degree + i sin 75 degree ) is di vided by4(cos 40 degree + i sin 40…

A: Given that, 20(cos 75° +i sin 75°)4cos 40° + i sin 75° We can use here,  eiθ = cos θ + i sin θ and…