May 13, 2018 · cos 30^circ = sin 60^circ because they're complementary angles, so this is sin 30^circ - {cos 30^circ} /{ sin 60^circ} = sin 30^circ - 1 = 1/2 - 1=-1/2 # Yet another 30/60/90 question. Get new a triangle people! I'll assume this is \\sin 30^circ - cos 30^circ /sin 60^circ I'm never really sure because many students forget to add parentheses around the numerator and …

Aug 6, 2015 · Find the value of sin (-30) Ans: -1/2 sin (-30) = - sin (30). Trig table gives --> sin 30 = 1/2 Therefor, sin (-30) = - 1/2

Please see below. As cos(90^@-theta)=sintheta we can write cos(60^@+A)=cos(90^@-30^@+A) = cos(90^@-(30^@-A)) = sin(30^@-A)

May 23, 2018 · For finding the value of sin 30° geometrically, we construct an equilateral triangle ABC of side 2a. From A, we draw perpendicular AD to BC. Now, BD = CD = 1/2 BC = a In triangle ABD, angle BAD + angle BDA + angle DAB = 180 (BY ANGLE SUM PROPERTY)

Oct 22, 2018 · Step 1:-According to the trigonometric ratio table, the value of sin 30 degrees is 1/2 i.e. 0.5. So, it is a constant value. Step 2:-∵ In differentiation, we have a constant rule which states that the derivative of a constant function is zero because the rate of change is zero, which leads to a horizontal line. So, = d/dx (sin 30 degree) = d ...

May 16, 2023 · The cosine of 30° is √3/2, so the secant of 30° is 2/√3 or (√3/3) * 2. Rationalizing the denominator, we get 2√3/3. cot 45°: The cotangent of 45° is the reciprocal of the tangent of 45°, which is 1. Therefore, cot 45° is also 1. Now let's substitute these values back into the expression: sin 30° + tan 45° / sec 30° + cot 45°

Apr 1, 2017 · How do you use the half angle identity to find sin 105? How do you use the half angle identity to find #tan (pi/8)#? How do you use half angle identities to solve equations?

Sep 22, 2024 · Cos45°+ sin60°/sec30°+cosec30° To solve this expression, we'll first convert the secant and cosecant functions to cosine and sine functions, respectively.

Dec 9, 2020 · The value of sin 30° is 0.5. Sin 30 degrees has a value of 0.5. In radians, sin 30 is represented as sin /6. The angle function, commonly known as the trigonometric function, connects the angles of a triangle to the length of its sides. #SPJ3

May 23, 2015 · (1 - sin^2 30) = (1 - sin 30)(1 + sin 30) = (1 - 1/2)(1 + 1/2) = 3/4. How do you apply the fundamental identities to values of #theta# and show that they are true?