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N76 [4]
3 years ago
7

Sine, cosines and tangent of 30 45 and 60 degrees

Mathematics
1 answer:
bonufazy [111]3 years ago
3 0

Answer:

Sine 30 =

\frac{1}{2}

Sine 45 =

\sqrt{ \frac{2}{2} }

Sine 60 =

\sqrt{ \frac{3}{2} }

Cos 30 =

\sqrt{ \frac{3}{2} }

Cos 45 =

\sqrt{ \frac{2}{2} }

Cos 60 =

\frac{1}{2}

Tan 30 =

\sqrt{ \frac{3}{3} }

Tan 45 =

1

Tan 60 =

\sqrt{3}

Step-by-step explanation:

I hope it helps

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timama [110]

Answer:

m<1 = 45°  

m<2 = 76°

m<3 = 80°

Step-by-step explanation:

<u>Points to remember</u>

1). Vertically opposite angles are equal

2). Sum of angles of a triangles is 180°

<u>To find the measures of given angles</u>

From the figure we get,

m<1 = 45°   [Vertically opposite angles]

By using angle sum property <2 + 59 + 45 = 180

m<2 = 180 - 104

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Also m<1 + m<3 + 55 = 180

m<3 = 180 - (m<1 + 55)

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3 years ago
Please look at the picture. I answered b but it was incorrect. <br> Please help.
LuckyWell [14K]

9514 1404 393

Answer:

  d.  14 -3x

Step-by-step explanation:

If you want to substitute for y in the second equation, you must use the first equation to find an expression for y.

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This gives you the expression for y that you want to use for substitution. It matches the expression of choice D.

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