Start your trial now! First week only $4.99!*arrow_forward*

Question

Prove each identity

cos ^{4} A- sin ^{4} A = cos 2A

Tagged in

Math

Trigonometry

Find answers to questions asked by students like you.

Q: Evaluate the following trigonometric functions exactly if they are defined. Otherwise, write "undefi...

A: Click to see the answer

Q: Use the given information and a calculator to find θ to the nearest tenth of a degree if 0<θ<3...

A: Given, cot x = -4.1923

Q: If y2 is positive, then y1 + y2 will lie _______ y1 by a distance equal to ____.

A: Consider a function y=sinx+1. Here y1=sinx and y2=1>0positive.

Q: Sketch the graph from x = 0 to x = 4p. y = 3 cos x + sin 2x

A: The given equation of the curve is: y = 3 cos x + sin 2x, and interval is 0≤x≤4π. To sketch the grap...

Q: Elisa needs money to repair her home air conditioner, so she pawns her bicycle. The pawnbroker loan...

A: Principal amount = $270 Amount paid = $289.80 Interest=$(289.80-270)=$19.80 t=12 days

Q: This is a Numerical Answer question. Please enter your answer as a decimal without units so that it ...

A: Given, cosθ=35 We have to find: sinθ Since angle is an acute angle hence sinθ will be positive. We k...

Q: A man starts walking from home and walks 4 miles east, 4 miles southeast, 7 miles south, 6 miles sou...

A: (a) The man walks , 4 miles East, 4 miles south east, 7 miles south, 6 miles southwest and 2 miles ...

Q: Solve #2

A: Given 8sinx+43=0

Q: A group of campers hike down a steep path. One member of the group has an altimeter on his watch to ...

A: In the triangle ABC, BCAC=sinθsinθ=5601250θ=sin-15601250θ=26.6°