SOLUTION: Prove each of the following trigonometric identities.
1) sin x sin 2x + cox x cos 2x = cos x
2) cot x = sin x sin (pi/2 - x) + cos^2 x cot x
3) 2 csc 2x = sec x csc x
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Question 1183638: Prove each of the following trigonometric identities.
1) sin x sin 2x + cox x cos 2x = cos x
2) cot x = sin x sin (pi/2 - x) + cos^2 x cot x
3) 2 csc 2x = sec x csc x
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Prove each of the following trigonometric identities.
1)
manipulate left side
..........use
=
= ...factor out
=
=
= ............use
=
2)
manipulate right side
.........use
=.... use
=
=
=
=
=
=
3)
manipulate left side
..................use
= .....simplify
=
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