The first picture is for number 1 and the second one for number 2.
Answer:
line QR
Step-by-step explanation:
Plane QRB is the front face. Plane TSR is the top face. The planes intersect at the top front edge, line QR.
Answer:
B
Step-by-step explanation:
you watch you Tube
Answer: M∠2 just mean measure of angle 2,
Step-by-step explanation: So I worked it out and the awnser is B.
3 numbers/the degrees of all 3 sides always add up to 180 degrees.
Side 1 is 60 degrees and the left side is 20, so 20 + 60 + 3 (unkown number) = 180
60 - 20 = 100,
6 sin 2x = 6 cos x Using the identity sin 2x = 2 sin x cos x:-
12 sin x cos x = 6 cos x
6 cos x ( 2 sin x - 1) = 0
either 6 cos x = 0 or 2 sin x - 1 = 0 so sin x = 1/2
x = pi/2, 3pi/2 , pi/6, 5pi / 6
answer is ( pi/6, pi/2, 5pi/6, 2pi/2)