Question

Q
G
Question No. 37
COS25ºcos350-sin 10°sin 20°
(A) 15+
(B)
(C) 15
(D) 0
O
A
B​

Answer 1

answer is zero.

= sin 10+sin20+sin30 + sin40 +...sin180 + sin(360-170)+ ……...+sin(360-40)+sin(360-30)+sin(360-20)+sin360-10)+sin360

sin360-x = - sin x

here all the terms cancled out

so, sin10+sin20+sin30+....+sin360=0

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘꜱ ʏᴏᴜ. ☺❤

Answer 2

Answer:

bhai mera maths bhot kmjor hain isliye answer nahi pta..

maaf karna bro