Algebra Ch 14

Given sinx=3/8, where 0 less than x less than pi/2, find the value of sin2x. Round to 3 decimal places

0.695

Find sin(A+B) given that sin A=5/7 with pi/2 less than or = to A less than or = to pi and cos B=5/8 with -pi/2 less than or equal to B less than or equal to 0.

25+(6 square root 26)/56

Solve 8cosx+4=0 in the interval 0 degrees less than or equal to x less than or equal to 360 degrees. The sum of the solutions is

360 degrees

Simplify 1-2sin^2(x/2)

cos x

Solve cos(x+ pi/4)+1=cos(pi/4-x) for 0 less than or equal to x less than or equal to 2pi

x=pi/4, 3pi/4