Home
Class 11
MATHS
Prove that: "sin"420^(@) cos390^(@)+cos(...

Prove that: `"sin"420^(@) cos390^(@)+cos(-660^(@))"sin"(-390^(@))=(1)/(2)`.

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRY

    MODERN PUBLICATION|Exercise Exercise 3(d)Long Answer type Question-I|6 Videos

  • TRIGONOMETRY

    MODERN PUBLICATION|Exercise Exercise 3( e) Short Answer type Question|7 Videos

  • TRIGONOMETRY

    MODERN PUBLICATION|Exercise Exercise 3(c) Long Answer type Question-II|2 Videos

  • STRAIGHT LINES

    MODERN PUBLICATION|Exercise Chapter test|12 Videos

Similar Questions

Explore conceptually related problems

Prove that: sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

Prove that: sin(-420^(@))cos390^(@)+cos(-660^(@))sin330^(@)=1

Prove that: sin420^(@)cos390^(@)+cos(-300^(@))sin(-330^(@))=1

Prove that sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

Prove that: sin600^(@)cos390^(@)+cos480^(@)s in150^(@)=-1

Prove that: sin780^(@)s in120^(@)+cos240^(@)sin390^(@)=(1)/(2)

Prove that: sin(45^(@)-A)=1/2cos2A

Prove that (sin36^(@)+cos36^(@))/(cos54^(@)+sin54^(@))=1

Prove that (sin32^(@)cos58^(@)+cos32^(@)sin58^(@))=1.

Prove that: cos420^@ sin390^@+ sin(-300^@)cos(-330^@)=1