Math, asked by prafullgunjal2004, 6 months ago

The value of the determinant [cos75°×cos30°+sin75°×sin30°] is

Answers

Answered by joshianuvrat

6

Step-by-step explanation:

here is your answer in above picture

Attachments:

Answered by wwwuamuam

14

formula :

cosAcosB + sinAsinB = cos(A-B)

cos75°cos30°+sin75°sin30°=cos(75°-30°)

=)cos 45°

= 1/√2

[cos75°cos30°+sin75°sin30°]=1/√2

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