Question

how could i remember the value of thetas on various angles​

Answer 1

Step-by-step explanation:

0 30 45 60 90

Sin 0 1/2 1/root2 root3/2 1

Cos 1 root3/2 1/root2 1/2 0

Tan 0 1/ root3 1 root3 infinite

All you need to do is remember the sin theta values only. As you can see the order of cos theta is just exactly opposite of the order of sin theta.

Then there is a formula...

Sin theta / Cos theta = Tan theta

So do get tan theta just divide the sin theta of the value by cos theta and you can get the answer as shown above.

Tan 90 = 1/0 which cannot be calculated. So tan 90 is infinite...

Hope it was helpful!!!