Math, asked by ThaliaStark07, 7 months ago

Q3. Evaluate:
cos3A – 2cos4A
when A = 15°
sin3A +2sin4A

Answers

Answered by 144speakup2me

1

Answer:

Cos45 - 2 cos 60 ÷ sin45 + 2 sin 60

Cos45 - 1 ÷ 1/√2 + 2 sin 60

1/√2 - √2 + √3

1- 2 + √6 ÷ √2

√12 - √2 ÷ 2

Step-by-step explanation:

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