**Without a calculator evaluate cos(9pi/4)?? im usually so**

Demonstrates how to use trig ratios to do simple solving of triangles. Search . r/60 = tan(30°) r = 60tan(30 Note: Since the sine and cosine ratios involve dividing a leg (one of the shorter two sides) by the hypotenuse,... To solve the expression sin 2pi/3, we can convert first 2pi/3 into degrees. pi is equal to 180, hence 2pi/3 is equal to 120 degrees. 120 degrees is located in the second quadrant in which the terminal angle equivalent is 60 degrees. Using special triangle 30-60-90, sin 120 is equal to sqrt 3 over 2.

**How do I find the value of sin 330? Socratic**

Split it up, into sin 45 plus sin 30. You will get sin 75, then subtract sin 10(you can do by using sin(3x) formula). Then you will get sin 65 You will get sin 75, then subtract sin 10(you can do by using sin…... Calculating trigonometric functions, such as sin, cos, tan, requires some fairly involved calculations. If you don't have a calculator, you best use tables.

**How do you solve sin (5pi/3) without a calculator**

7/01/1997 · Trigonometry Without Calculators Date: 01/06/97 at 20:15:08 From: Sriram Gollapalli Subject: Cosine 40 Hi! I was wondering how to find the cosine of 40 degrees in rational form and without a calculator. how to tell a customer no without saying no The answer is -pi/4 Alright, archtan / tan^-1(x) is the inverse of tangent. Tan is sin/cos. Like the inverse of sin, the inverse of tan is also restricted to quadrants 1 and 4. Knowing this we are solving for the inverse of tan -1. We are basically being asked the question what angle/radian does tan(-1) equal. Using the unit circle we can see

**How do you solve sin (5pi/3) without a calculator**

6/04/2007 · now i have fount the solution to be (-2/3)(2^(1/2)) now not only did my calculator come up with that but between the SSS formula and pythagorean formula( i think is what we cal it, a^2+b^2....) i was able to get the same answer but the question says not to use a calculator and using those formulas how to win at the casino with little money If you look really closely, you’ll notice that 45 degrees – 30 degrees = 15 degrees, and 45 degrees + 30 degrees = 75 degrees. For the angles you can rewrite as the sum or difference of special angles, here are the sum and difference formulas for sine:

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### What is sin 2pi/3? How do you solve without a calculator

- What is sin 2pi/3? How do you solve without a calculator
- Solving Trigonometric Equations · Precalculus
- Without a calculator evaluate cos(9pi/4)?? im usually so
- Without a calculator evaluate cos(9pi/4)?? im usually so

## How To Solve Sin 30 Without A Calculator

The answer is -pi/4 Alright, archtan / tan^-1(x) is the inverse of tangent. Tan is sin/cos. Like the inverse of sin, the inverse of tan is also restricted to quadrants 1 and 4. Knowing this we are solving for the inverse of tan -1. We are basically being asked the question what angle/radian does tan(-1) equal. Using the unit circle we can see

- 360 - 330 = 30, so we are subtracting 30 degrees from 360 to get the sin inverse, 330. Since we are subtracting from 360, the ratio will remain sin, and because it is in the 4th quadrant, the sin …
- Calculating trigonometric functions, such as sin, cos, tan, requires some fairly involved calculations. If you don't have a calculator, you best use tables.
- The answer is -pi/4 Alright, archtan / tan^-1(x) is the inverse of tangent. Tan is sin/cos. Like the inverse of sin, the inverse of tan is also restricted to quadrants 1 and 4. Knowing this we are solving for the inverse of tan -1. We are basically being asked the question what angle/radian does tan(-1) equal. Using the unit circle we can see
- Split it up, into sin 45 plus sin 30. You will get sin 75, then subtract sin 10(you can do by using sin(3x) formula). Then you will get sin 65 You will get sin 75, then subtract sin 10(you can do by using sin…