A ramp with a one-meter distance from edge to edge reaches a height of 0.643 meters. What is the value of the acute angle? I am so stumped Im pretty sure its sine because that angle looks like a ramp

Question

A ramp with a one-meter distance from edge to edge reaches a height of 0.643 meters.  What is the value of the acute angle? I am so stumped Im pretty sure its sine because that angle looks like a ramp

campbell_st · Answer

draw a picture

I'd assume the angle is the one the ramp makes with the ground

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you have the opposite side and the hypotenuse. 

Which trig ratio would you use?

anonymous · Answer

yes Its 40 because the the big angle is 140 so the little angle must be 40 to make it add up to 180!

campbell_st · Answer

nope a triangle has 3 angles... so if one of them is 90, then the remaining angles add to 90.

anonymous · Answer

can you help me on this one Which of the following is a true statement for 0° <  < 90°?
Atan = -tan
B tan theta = -tan(180° -theta ).
tan theta= tan(90° -theta )
d.
none of the above