Math, asked by sahildhote91, 9 months ago

Find the value of cos 75º

Answers

Answered by avrx2003

3

Answer:

Step-by-step explanation:

Apply the trig identity: cos (a + b) = cosA.cosB - sinA.sinB

That is,

Cos (75) = cos (30+45) = cos30.cos45 - sin30.sin45

= (√3/2) (√2/2) - (1/2) (√2/2)

= (√6-√2)/4

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