# Trigonometry Important Questions | Class 10 Maths | Q5

###### Chapter 8 Extra Questions | Trigonometric Ratios

This CBSE class 10 Maths extra question is from the topic Trigonometry. Concept Tested: computing trigonometric values for select angles and using that to find values of trigonometric expressions.

[$$frac{\sqrt{3}}{2}$ × $\frac{\sqrt{3}}{2}$] - [$\frac{\text{1}}{\text{2}}$ × $\frac{\text{1}}{\text{2}}$] = [$\frac{\text{3}}{\text{4}}$ - $\frac{\text{1}}{\text{4}}$] = $\frac{\text{1}}{\text{2}}$ ####$ii) cos A cos C + sin A sin C

[$\frac{\sqrt{3}}{2}$ × $\frac{\text{1}}{\text{2}}$] + [$\frac{\text{1}}{\text{2}}$ × $\frac{\sqrt{3}}{2}$] = $\frac{\sqrt{3}}{2}$

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