Question

sin 8 + COS
1) 1
b) 1-sin od
sin 1° + sin-2° + ... + sin 90°
a) 90
b) 45
A circle is divided into n equal s​

Answer 1

Answer:

i really can't understand what is it

Check ur ques my bro / sis..

bt i cn introduce sme formulas to u

Hope it will help u to solve this.

here it is :

• sin² θ + cos² θ = 1
• tan² θ + 1 = sec² θ
• cot² θ +1 =cosec²θ

Ans.2)

sin 46° + sin 47° +...+ sin 89°

= sin (90-46)° + sin(90-47)° +...

+sin(90-89°)

= cos 44° + cos 43°+…+cos1°

THEREFORE:

A/Q,

sin 1° + sin 2° +...+ sin 90°

={sin1°+…+sin44°}+sin45°

+{cos1°+…+cos44°} +sin90°

=1×44 + 1×44 + sin45° +1

= 3 + (1/√2) ans.

...this is very interesting

Isn't it..?

(°o^) Enjoy..