What is the value of sin(pi/3)+cos^2((5pi)/6) ?

The value of sin(pi/3)+cos^2((5pi)/6) is (sqrt(3))/2+3/4

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sin(pi/3)+cos^2((5pi)/6)

sin (\frac{π}{3}) + cos^{2} (\frac{5 π}{6})

\frac{3}{2} + \frac{3}{4}

Decimal Notation

1.61602 \dots

Solution steps

sin (\frac{π}{3}) + cos^{2} (\frac{5 π}{6})

Use the following trivial identity:

sin (\frac{π}{3}) = \frac{3}{2}

sin (\frac{π}{3})

sin (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{3}{2}

Use the following trivial identity:

cos (\frac{5 π}{6}) = - \frac{3}{2}

cos (\frac{5 π}{6})

cos (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

= - \frac{3}{2}

= \frac{3}{2} + (- \frac{3}{2})^{2}

Simplify

\frac{3}{2} + (- \frac{3}{2})^{2} : \frac{3}{2} + \frac{3}{4}

\frac{3}{2} + (- \frac{3}{2})^{2}

(- \frac{3}{2})^{2} = \frac{3}{2 ^{2}}

(- \frac{3}{2})^{2}

Apply exponent rule:

(- a)^{n} = a^{n},

n

is even

(- \frac{3}{2})^{2} = (\frac{3}{2})^{2}

= (\frac{3}{2})^{2}

Apply exponent rule:

(\frac{a}{b})^{c} = \frac{a ^{c}}{b ^{c}}

= \frac{( 3 ) ^{2}}{2 ^{2}}

(3)^{2} : 3

Apply radical rule:

a = a^{\frac{1}{2}}

= (3^{\frac{1}{2}})^{2}

Apply exponent rule:

(a^{b})^{c} = a^{b c}

= 3^{\frac{1}{2} \cdot 2}

\frac{1}{2} \cdot 2 = 1

\frac{1}{2} \cdot 2

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{1 \cdot 2}{2}

Cancel the common factor:

2

= 1

= 3

= \frac{3}{2 ^{2}}

= \frac{3}{2} + \frac{3}{2 ^{2}}

2^{2} = 4

= \frac{3}{2} + \frac{3}{4}

= \frac{3}{2} + \frac{3}{4}

1.5 \cdot sin (0.14)

cot (4 5^{\circ}) + cot (9 0^{\circ})

arctan (\frac{- 791.18}{287.22})

23 sin (\frac{7 π}{6})

arctan (\frac{0}{- 12})

What is the value of sin(pi/3)+cos^2((5pi)/6) ?
The value of sin(pi/3)+cos^2((5pi)/6) is (sqrt(3))/2+3/4