Math, asked by 9078755442, 3 months ago

prove that cos 75°=✓3-1/2√2

Answers

Answered by dhara7890

0

Step-by-step explanation:

cos(30+45)

=cos30cos45 - sin30sin45

=1/(2)^1/2. { (3)^1/2/2-1/2)

=

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