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# truiangles

A straight road leads from an ocean beach into the nearby hills. The road has a constant upward grade of 7°. After taking this road from the beach for a mile and a quarter, how high above sea level...

# Applications of Sinusoidal Functions and Their Derivatives

A differential equation is an equation involving a function and one or more of its derivatives. Determine whether the function y=πsinθ+2πcosθ is a solution to the differential equation d^2y/dθ^2...

# Differentiation Rules for Sinusoidal Functions

1. Find the slope of the function y=2cosxsin2x at x=π/2   2. Find the equation of the line that is tangent to y=x2sin(2x) at x=-π   3. Determine the second derivative for...

# need help with this

find the exact value of cos(17π/6)=x , and sin(300 degrees)=y

# how do i solve this

the graph of y=2sin(3x+π/4) is obtained from the graph of y=2sin(3x) by shifting to   1.) to the left π/12 units   2.) to the right π/12 units.   3.) to...

# Write sin(sin^-1x-cos^-1x as an algrebraic expression in x.

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

# Use the power reducing identities to write sin^2xcos^2x in terms of the first power of cosine.

This is for my trig class. Thanks for the help!

# Find all solutions in the interval [0,2pi): sin2x=cosx

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

# Use the sum or difference formulas to determine: A. sin105 degrees and B. tan15 degrees

This is for my trig class, thanks for the help!

# Simplify (sin42degrees)cos38degrees-(cos42degrees)sin38degrees

This is for my trig class, thanks for the help!

# Verify: cosusinv=1/2[sin(u+v)-sin(u-v)

This is for my trig class, thanks for the help!

# Given sintheta=4/5, theta lies in Quadrant II, find cos (theta/2)

This is for my trig class. Thanks for the help!

# Find all solutions in the interval [0,2pi): sin2x=cosx

This is for my trig class. Thanks for the help!