Question

Evaluvate :cos 60 cos 45-sin 60 sin 30

Answer 1

Step-by-step explanation:

cos 60 cos 45-sin60 sin 30

1/2×1/√2-√3/2×1/2

1/2√2-√3/4

1×√2/2√2×√2-√3/4

√2/4-√3/4

√2-√3/4(ANS)