Question

(cos0° + sin 45° + sin 30°)(sin 90° - cos 45º + cos 60°)



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Answer 1

Answer:

(cos0° + sin 45° + sin 30°)(sin 90° - cos 45º + cos 60°)

=> (1+1/√2+1/2) (1-1/√2+1/2)

=> (1+1/2+1/√2) (1+1/2-1/√2)

=> (3/2+1/√2) (3/2-1/√2)

=> (3/2)²- (1/√2)²

=> 9/4 − 1/2 = 7/4

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