Question

how to find value of sin70​

Answer 1

Answer:

Step-by-step explanation:

What is the value of sin (70 degrees) without using a calculator?

Why should I use DuckDuckGo instead of Google?

With known angles and addition/subtraction and half angles formulas,

there might exist a way but maybe you just gotta approximate. I would bet on having to approximate.

45+30 = 75

(30/2)/2+60 = 67.5

((30/2)/2)/2+(30/2)/2+60 = 71.25

Idk if you can find a way to use known angles to get the exact answer for sin(70°) but you can get exact answers for angles that are very very very close, can even get closer than my example.