Which one of the following sets contains only acute angles?

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Which one of the following sets contains only acute angles? (a) {0∘, 60∘, 88∘}\{0^{\circ},\ 60^{\circ},\ 88^{\circ}\} (b) {30∘, 90∘, 85∘}\{30^{\circ},\ 90^{\circ},\ 85^{\circ}\} (c) {10∘, 45∘, 80∘}\{10^{\circ},\ 45^{\circ},\ 80^{\circ}\} (d) {22∘, 89∘, 97∘}\{22^{\circ},\ 89^{\circ},\ 97^{\circ}\}

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