Find the measurement of the reference angle of an angle measuring 5 pi divided by 4.
d. - pi/4
step by step explanation is 100% wanted and I will give thanks!
& just so I don't make another board. ..
Write cos 6x cos x - sin 6x sin x in terms of a single.. trigonometric function.. i only got to cos 7x - sin 7x
and write 2 cos(squared) 2 theta - 1 in terms of a single trigonometric function.
Use the half angle identity to evaluate tan 67.5degrees.
if i do tan(67.5dividedby 2) = sin67.5divided by 1+ cos67.5 how do i get
c.squareroot(2) - 1
d. 2 - squareroot(2)
Find the exact value of cos 2 theta given that sin theta = - 3 divided by 5 and theta is in quadrant III,.
and last one i promiss after i get help with these i will try to help others to warm me up for my finals!
a. - 7/25
please don't just give the answear but explain things! THAnKS!!