Question

Find the value : (Cos 0°+Sin30°+Sin45°
) (Sin90°+Cos60°

-Tan45°)​

Answer 1

Answer:

$- \frac{5}{4}$

Step-by-step explanation:

$( \cos {0}^{0} + \sin {30}^{0} + \sin {45}^{0} )( \sin {90}^{0} + \cos {60}^{0} - \tan {45}^{0} )$

$= (1 + \frac{1}{2} + 1)(0 + \frac{1}{2} - 1)$

$= ( \frac{5}{2} ) \times ( \frac{ - 1}{2} )$

$= \frac{ - 5}{4}$