Math, asked by hiralpathak3889, 1 year ago

Sin(-330).cos(-300)+sin(-420).cos390 =-1/2

Answers

Answered by GoKuL3112003

0

Sin(-x)=Sin(360-x),Sin(90-x)=Cos(x) so
Sin(-330)=1/2;Cos(-300)=1/2;Sin(-420)=-Sin60;Cos390=Cos30=Sin60
So
1/2×1/2-3/4=-1/2

Previous Question

Next Question

Similar questions

Math, 8 months ago

discuss the convergence of the above sequence ...

CBSE BOARD XII, 8 months ago

8) which of the following does not fulfill the aim of a system ? A) finishing the task efficiently B) To quickly achieve goals C) To provides Systematic approach. D) Unorganised approch for solving problems.

Math, 8 months ago

V. Select the correct answers from the brackets and fill the gaps (10,000, 100, 1000, 0, 1) 1. 1 more than the largest 3 digit number is...

Math, 1 year ago

Do you know where this bridge is located?vancauver,krakow,sydeney,Cologne...

Math, 1 year ago

If a+b+c=0 then find the value of a+b upon c +b+c upon a+ c+a upon b...

English, 1 year ago

what is happy prince...

Math, 1 year ago

the sum of two number is 91 and the greater is 6 times the less.faind the number.

Biology, 1 year ago

what is the function of vegina...