plz someone help to do this no. 185
Answers
Answer:
i) x=69.28m ii)x=40m iii)x=60°
Step-by-step explanation:
185)
Let ∅(teta) be the angle.
i) tan ∅=opposite side/adjacent side (x=30°)
tan 30°= x/120
1/√3=x/120
x=120/√3
x=120√3/√3 .√3 (√3 . √3 = 3)(multiplying numerator and denominator with √3)
x=40 x 1.732 (√3=1.732)
x=69.28m
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ii) tan ∅=opposite side/adjacent side
tan 45°=x/40
1 = x/40
x=40m.
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iii)cos∅=adjacent/hypotenuse (here we should find ∅=x)
so, cos x= adjacent/hypotenuse
cos x=50/100
cos x=1/2 (here: from the standard values of trigonometry, we know cos 60°=1/2)
here, cos x=1/2
so, x=60°.
Hope it helps:)
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