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Finger [1]
1 year ago
12

If sin theta = 3/4 and is in the first quadrant, then cos theta

Mathematics
2 answers:
Rashid [163]1 year ago
7 0

Answer:

\frac{\sqrt{7} }{4}

Step-by-step explanation:

since sin theta = 3/4, opposite length = 3 units and hypotenuse length = 4 units

by pythagoras' theorem, adjacent length = \sqrt{7}

thus cos theta = adjacent/hypotenuse = \frac{\sqrt{7} }{4}

larisa86 [58]1 year ago
6 0
Sin(θ)=3/4
α=sin^-1 (3/4)
= 0.84806207898
since it is in the first quadrant
θ=0.84806207898
thus cos(θ)=cos(0.84806207898)
= 0.66143782777
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see explanation

Step-by-step explanation:

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Add (2) and (3) term by term

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