Math, asked by Noni1383, 1 year ago

Cos 15 .cos75 - sin 75 . sin 15

Answers

Answered by mysticd

1

Solution:

_____________________

We know that ,

cosA cosB-sinAsinB

= cos(A+B)

_____________________

Here,

A = 15, B = 75

Now,

Cos 15 .cos75 - sin 75 . sin 15

= cos(15+75)

=cos90°

= 1

•••

Answered by nalinsingh

1

Answer:

Step-by-step explanation:

Attachments:

Previous Question

Next Question

Similar questions

Computer Science, 6 months ago

write the name of all computer language...

Math, 6 months ago

please solve this both problems and help me please solve this both problems ...

Hindi, 6 months ago

विज्ञापन और हमारा जीवन निबंध लेखन .विज्ञापन का अर्थ। प्रकार। .लुभावने विज्ञापन .विज्ञापनों का प्रकार। .गलत विज्ञापनों पर रोक का उपयोग please guys tell me....

English, 1 year ago

dramatist,novelist,critic,poet odd one...

English, 1 year ago

Get out! Change into assertive sentence...

Math, 1 year ago

slove the following by method of transposition and verify your answers by substituting in the equations 7(x-2)-4(5-x)=1...

Physics, 1 year ago

Sensitivity of potentiometer...

Social Sciences, 1 year ago

3 POINTS ON Drafting Commitee...